For most products, purchases tend to fall with decreases in buyers' incomes. Such products are known as:

Which of the following is characteristic of indifference curves?

a. They are negatively sloped. b. They never intersect. c. They are convex toward the origin. d. All of the above are correct.

An increase in the price of steel to car manufacturers will cause

A. the demand for cars to decrease. B. the supply curve for cars to shift left. C. the quantity supplied of cars to increase. D. the quantity demanded for cars to increase.