Mathematics High School

WILL GIVE BRAINLIEST

1. A department store kept records of how many fans were sold each day and the high temperature for that day. The results are shown in the scatterplot. Answer the questions about the scatterplot.

a. What is the explanatory variable (independent variable)? (1 point)



b. What is the response variable (dependent variable)? (1 point)



c. Circle the best range for the correlation coefficient. (1 point)
(–1 to –0.7) (–0.7 to –0.3) (–0.3 to 0) (0 to 0.3) (0.3 to 0.7) (0.7 to 1.0)

d. Based on this scatterplot, does a rise in temperature cause more fans to be sold? Why or why not? (3 points)






2. This scatterplot shows the relationship between a player's level in a game and the point total in the level. Answer the questions about the scatterplot.

a. The best model for these data would be (linear / exponential / quadratic). (Circle the correct answer.) (1 point)
b. This table shows the values from the scatterplot. Find the regression equation for the model that you chose in Part a. Round your answer to the nearest hundredth. (3 points)
x
Level
y
Point total
1
124
2
156
3
194
4
240
5
305
6
380
7
477
8
596
9
745






c. Using the equation that you found in Part b, predict the point total in the 10th level. Round your answer to the nearest integer. (2 points)






3. Maria is a veterinarian. She wants to know how the weight of a puppy is related to its length. To find out, Maria randomly selected 10 puppies that are two months old. She recorded the length and weight of each puppy in the table below.

Part A. The data from the table are shown on the scatterplot. Draw an estimated line of best fit through the data points. (3 points)
Part B. Use the scatterplot to answer these questions.
a. What kind of correlation exists between the length and weight of the puppies? Explain. (2 points)



b. Identify two points on the line of best fit that you drew in Part A. Use the two points to find the equation of the line. Write the equation of the best fit line in slope-intercept form. Show your work. (4 points: 1 point for identifying the coordinates of two points, 1 point for slope, 1 point for b-value, and 1 point for showing work)






4. Maria also wants to study the relationship between the weight of puppies at birth and their adult weight (at two years old). She collected data from five randomly selected small-breed dogs and displayed the data in the table.
Birth weight
(pounds)
Adult weight
(pounds)
1.5
10
3
17
1
8
2.5
14
0.75
5
Part A. Use the data in the table to create a scatterplot. (5 points)

Part B. Look at the scatterplot that you drew in Part A. Which regression equation (linear, exponential, or quadratic) do you think would be the best model for these data? To help you decide, think about the adult weight you would expect if the birth weight were larger — say, 10 pounds. Would you expect the pattern in the scatterplot to continue? To grow exponentially? To change direction? Explain your answer. (2 points)






Part C. Perform a linear regression and interpret the results.
a. Use a calculator to perform a linear regression. Round the values your calculator gives you for a and b to the nearest hundredth. (2 points)
y = _______x + _______
b. What is the slope of the regression equation? What does this mean in terms of the birth weight and adult weight? (2 points)



c. What is the value of the correlation coefficient? (1 point)



d. Describe the correlation in terms of strength (weak or strong) and direction (positive or negative). (2 points)



Part D. Analyze the residuals.
Birth weight
(pounds)
Adult weight
(pounds)
Predicted
adult weight
Residual
1.5
10

3
17

1
8

2.5
14

0.75
5

a. Use the linear regression equation from Part C to calculate the predicted adult weight for each birth weight. Round to the nearest hundredth. Enter these in the third column of the table. (2.5 points)
b. Find the residual for each birth weight. Round to the nearest hundredth. Enter these in the fourth column of the table. (2.5 points)
c. Plot the residuals. (3 points)

d. Based on the residuals, is your regression line a reasonable model for the data? Why or why not? (2 points)




5. Decide whether each statement is true or false. (1 point each)
a. T/F: If there is a strong correlation between two variables, the correlation coefficient will be close to –1 or 1.

b. T/F: If there is a negative correlation between two variables, the slope of the regression line will be positive.

c. T/F: If there is a strong correlation between two variables, there is a cause-and-effect relationship.

d. T/F: The best model for data that change direction is a linear model.

e. T/F: A regression line is useful for predicting unknown values within the range of the observed data values.

WILL GIVE BRAINLIEST1. A Department Store Kept Records Of How Many Fans Were Sold Each Day And The High
WILL GIVE BRAINLIEST1. A Department Store Kept Records Of How Many Fans Were Sold Each Day And The High
WILL GIVE BRAINLIEST1. A Department Store Kept Records Of How Many Fans Were Sold Each Day And The High
WILL GIVE BRAINLIEST1. A Department Store Kept Records Of How Many Fans Were Sold Each Day And The High

Answers

Answer 1

Answer:

Step-by-step explanation:

WILL GIVE BRAINLIEST1. A Department Store Kept Records Of How Many Fans Were Sold Each Day And The High
WILL GIVE BRAINLIEST1. A Department Store Kept Records Of How Many Fans Were Sold Each Day And The High
WILL GIVE BRAINLIEST1. A Department Store Kept Records Of How Many Fans Were Sold Each Day And The High
WILL GIVE BRAINLIEST1. A Department Store Kept Records Of How Many Fans Were Sold Each Day And The High
Answer 2

Answer to #5: is T, F, F, F, T I'm pretty sure that's correct.

Related Questions

What is 4.33 rounded to the nearest whole number?

Answers

Answer:

the answer is 4 because i rounded down. since its 3

Step-by-step explanation:

Can someone help me we are suppose to do pythagorean theorem.

Answers

Answer:

yeah this easy [tex]a^{2} +b^{2} =c^{2} \\leg leg hypotnuse[/tex]

a is a leg

b is a leh

c is a hypotnuse

Step-by-step explanation:

Find the slope. Please reply if you can help

Answers

Answer:

1/1 because you go up 1 and over 1

Answer:

look at the picture i have sent

Can someone HELP ME ON NUMBER 16 IM NOT SURE IM RIGHT!!!

Answers

Answer:

true im not sure tho but trust me

Step-by-step explanation:

Which of the following is an inscribed angle in the diagram below?

Answers

Answer:

A  

Step-by-step explanation:

Question #9: The box-and-whisker plots below show the mean monthly
temperatures (°F) for Mexico City, Mexico, and Shanghai, China. What
percent of the temperatures for Shanghai fall between 46°F and 78°F?

Answers

Answer: 50%

Step-by-step explanation:

Algebra II:
The 4th term of a geometric sequence is 48, and the common ratio is 2. What is the first term of the sequence?

*There are no answer choices available on Kydor*

Thank you so much for your help!

Answers

Answer:

6

Step-by-step explanation:

[tex]nth \: term \: of \: geometric \: \\ sequence \: is \: given \: as : \\ a_n = a {r}^{n - 1} \\ (a = ?, \: \: r = 2)\\ \\ a_4 =48......(given) \\ \\ \therefore \: a {(2)}^{4 - 1} = 48 \\ \\ \therefore \: a {(2)}^{3} = 48\\ \\ \therefore \: 8a = 48 \\ \\ \therefore \: a = \frac{48}{8} \\ \\ \therefore \:a = 6[/tex]

Answer:

6

Step-by-step explanation:

geometric sequence is given as Tn=ar^n-1

where Tn is the last term,a is the first term, r is the common ratio, n is the nth term

hence 48=a2^(4-1)

48=a2^3

48=a8 (divide both by 8 to ramain with a)

6=a

therefore the first term is 6 .

HELPPPPPOOPPPLLLL pleaseee begging

Answers

Answers:

surface area : (41.2x2) + (4x9x6) = 298.4 cm 2

volume: 41.2 x 9 = 370.8 cm 3

Step-by-step explanation:

Arthur, Kyle, and Tom are all on the baseball team. At the end of the season, they compared how many home runs each of them hit. Arthur noticed that if he doubled the number of home runs he hit and then subtracted 1, he would get the number of home runs Kyle hit. Tom noticed that if he subtracted 1 from the number of home runs he hit and then doubled that number, he would get the number of home runs Kyle hit. Write an expression representing the number of home runs Kyle hit in terms of the number of home runs Arthur hit, a. Enter your response in the first response box. Write an expression representing the number of home runs Kyle hit in terms of the number of home runs Tom hit, t.

Answers

Answer:

k = 2a - 1

k = 2(t - 1)

Step-by-step explanation:

Let :

Number of home runs Arthur hit = a

Number of home runs Kyle hit = k

Number of home runs Tom hit = t

Kyle's home runs, k in terms of Arthur's home run : Double the value of a ; then subtract 1

k = 2a - 1

Kyle's home runs in terms of Tom's home runs ;

Subtract 1 from t `

k = 2(t - 1)

please answer correctly !!!!! Will mark brainliest !!!!!!!!!!!!!!

Answers

Answer:

66.4

Step-by-step explanation:

Answer:

45 degrees

Step-by-step explanation:

Sin(x)= 62/88

Sin-¹(62/88)= 44.8 = 45. (The inverse function of sine)

Point O is the centre of the circle.
What is the value of x°?​

Answers

Answer : 54°
Explanation: the arc of point H is the same arc of point G, now you double the angle’s value to find the arc and that gives you 108. Half the arc to find the angle, which is 54°. In other words the arcs are equal, so the angles are equal.

does anyone know how to find the area of a triangle on a graph ? THIS CAN BOOST MY GRADE BY THREE LETTERS!

Answers

Answer:

1/2bh

Step-by-step explanation:

graph has base and height

also triangle have base and height

what is the answer for a and b ?

Answers

Answer:

a. 3/10

b. 25 people

Step-by-step explanation:

a. 12/40

simplify

3/10

b. 40 people so multiply everything by 5

5 x 5 =25 people

Answer:

a) 30%   & b) 25

Step-by-step explanation:

16+7+5+12 = 40

a) 12/40 = 0.3 = 3%

b) 5/40 = .125

    200 x .125 = 25

18:40 ratio in simplest terms

Answers

Answer:    

9/20

Step-by-step explanation:        

Therefore, 18/40 simplified to lowest terms is 9/20.

9/20 is the simplest term of 18:40

19+4n

But "n=4"

IF YOU DON'T EXPLAIN OR PUT A FAKE ANSWER YOU WILL BE REPORTED

Answers

sub the number in
19 + 4(4)
= 19 + 16
= 35
multiplication is first because of bedmas

Answer:

35

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to Right

Step-by-step explanation:

Step 1: Define

Identify

19 + 4n

n = 4

Step 2: Evaluate

Substitute in n:                                                                                                  19 + 4(4)Multiply:                                                                                                             19 + 16Add:                                                                                                                   35

PLS HELPPP WILL GIB BRAINLESt NEed ANSWERS FOR ALL ASAP!!!!!!!!

Answers

Answer:

https://brainly.com/question/23528231

Step-by-step explanation:

points for sell come get theme.

Answers

I’m gettting rippedddd tttonightttt

$32 is 8% of what amount?

Answers

Answer:

$32 is 8% of 400

Step-by-step explanation:

Have a good day :)

Answer:

100/8 = 12.5

32*12.5 = $400

I Need help ASAP it is due today 5/26/21

Answers

Answer:

Step-by-step explanation:

[tex]9*8=72\\0.5*6*8=24\\10*9=90\\72+24+90=186 m^{2}[/tex]

what is the equation of this line

a. y = -3/2x+9
b. y = -2/3x+18
c. y = 2/3x+6
d. y = 3/2x+6​

Answers

Answer:

A. y = -3/2x + 9

Step-by-step explanation:

In slope intercept form (y = mx + b), b represents the y-intercept. Therefore, simply look on the graph where the line intersects with the y-axis. In this case, that is all that was needed since we can clearly see that equation A is the only one with a y-intercept of 9.

Answer:

a

Step-by-step explanation:

any two points on the line are

(0,9 ) and (4,3)

slope=(3-9)/(4-0)=-6/4=-3/2

y intercept is 9

so eq. of line is y=-3/2x+9

I will give brainly if right

Find the value of x that will make A||B.
A+
2x + 5
3x - 2
В.
x = [?]

Answers

Answer:

Alternate interior angles are congruent, so 2x+5 = 3x -2.  X=7

Step-by-step explanation:

Write the equation in standard form for the circle with center (-7,0) and radius 4 7

Answers

Answer:

x² + y² - 8x -14y - 105 = 0

Step-by-step explanation:

The centre of the circle is (-7,0) and the radius is (4,7) . Firstly let's find the radius using Distance formula .

=> D = √{ (-7-4)²+(0-7)²}

=> D = √ 11² + 7²

=> D = √ 121 +49

=> D = √170

Now using the standard equation of circle ⭕ ,

=> ( x - h)²+(y-k)² = r²

=> ( x - 4)²+(y-7)²= (√170)²

=> x² + 16 -8x + y² + 49 -14y = 170

=> x² + y² -8x -14y = 170 -65

=> x² + y² - 8x -14y - 105 = 0

• Hence the equation of circle is x² + y² - 8x -14y - 105 = 0 .

determine the equation of a circle with the center (8,10) and radius 6​

Answers

Answer:

(x - 8)² + (y - 10)² = 36

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to Right

Algebra I

Coordinates (x, y)

Pre-Calculus

Circle Center Formula: (x - h)² + (y - k)² = r²

(h, k) is centerr is radius

Step-by-step explanation:

Step 1: Define

Identify

(h, k) = (8, 10)

r = 6

Step 2: Find Equation

Substitute in variables [Center Circle Formula]:                                             (x - 8)² + (y - 10)² = 6²Evaluate exponents:                                                                                         (x - 8)² + (y - 10)² = 36

Please help! I will give Brainliest!

Answers

Answer:

3/10

Step-by-step explanation:

First we count the number of beans in total which is 20

Then we count the number of red beans which is 6

6/20 can be simplified to 3/10

Answer:

C) 3/10

Step-by-step explanation:

There are 6 red + 5 blue + 4 green + 5 black = 20 jelly beans in total

Since there are 6 red jelly beans, the probability of randomly selecting a red jelly bean is 6 red jelly beans / 20 total jelly beans = 6/20 = 3/10

The base of a basketball goal has the shape of a rectangular pyramid The base goal must be gilled with sand so the goal does not fall down The base of the pyramid 4.5 feet long and 4 feet wide. The height of a pyramid is 2.5 feet. How much sand be needed to fill the base of the basketball goal?

Answers

Answer:

15 ft^3

Step-by-step explanation:

Sand needed can be determined by calculating the volume of a pyramid

Volume of a pyramid = 1/3 x ( length base x height)

1/3 x ( 4.5 x 4 x 2.5) = 15 ft^3

The domain (input values) of the sine function is:
O A. values between 0 and a radians,
O B. all real numbers.
O C. values less than 90%.
D. values less than 27 radians,

Answers

Answer:

The domain (input values) of the sine function is:

O B. all real numbers

The domain of the sine function will be all real number. Then the correct option is B.

What are domain and range?

The domain means all the possible values of x and the range means all the possible values of y.

Simply put, trigonometric functions also referred to as cyclic capabilities the functions of a triangle's inclination.

Let the sine function be f(x) = sin x.

It is a function that repeats itself in a particular time interval.

The domain of the sine function will be all real number.

And the range of the sine function will be [1, –1].

Then the correct option is B.

The graph of the sine function is given below.

More about the domain and range link is given below.

https://brainly.com/question/12208715

#SPJ5

The circumference of a circle is 15 centimeters. What is the diameter? Round to the nearest hundredths place.

Answers

Answer:

4.77

Step-by-step explanation:

because Circumference can be found with this equation

C = 2piR

we need to plug in 15 for Circumference and solve for its radius or R.

15 = 2piR

15/2pi = R

but we need diameter which is 2R so we just need to multiply the answer by 2.

15/2pi × 2 = Diameter

15/pi = D

approximately = 4.77

brainliest goes to whoever answers the question correctly also if you want more points answer my other questions (what is the rate of change?)

Answers

Answer:

The rate of change is to mathematically describe the percentage change in value over a period of time

Given: α is an angle in the second quadrant, csc α = 25/7; β is an angle in the first quadrant, cos β = √2/2. The value of tan ( α - β ) = _____.
-3/17
29/17
-31/17
15/17

Answers

Answer:

-31/17

Step-by-step explanation:

csc²α-cot²α=1

cot²α=csc²α-1=(25/7)²-1=(625-49)/49=576/49

α is in 2nd quadrant so cotα is negative.

cot α=-√(576/49)=-24/7

tan α=-7/24

cos β=√2/2

sec β=2/√2=√2

sec²β-tan ²β=1

tan ²β=sec²β-1

tan²β=(√2)²-1=2-1=1

β is in 1st quadrant ,so tan β is positive.

tan β=1

[tex]tan (\alpha -\beta )=\frac{tan \alpha -tan \beta }{1+tan \alpha tan \beta } \\=\frac{\frac{-7}{24} -1}{1+(\frac{-7}{24}) (1)} \\=\frac{-7-24}{24-7} \\=\frac{-31}{17}[/tex]

PLEASE HELP ME DUE IN 5 MINS! Evaluate the expression for =10
(−10)(+2)

Answers

Answer:

12

Step-by-step explanation:

(10-10)(10+2)

=12

do whats inside the brackets then multiply (BEDMAS)

hope this helps

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