Answer:
Interest rates represent the opportunity costs of investors. If the interest rates are too high, then the opportunity cost of making an investment increases, since the investor could simply decide to purchase Treasury Bonds, corporate bonds, or put the money on a CD. As interest rates increase, total output decreases since investment in new projects decreases.
On the other hand, if interest rates lower, the opportunity cost of investors decrease. Investors will be willing to invest in new projects instead of purchasing Treasury Bonds, corporate bonds, or put the money on a CD. As interest rates decrease, total output increases since investment in new projects increases.
Explanation: