Question: Suppose we measure the quantity of good X on the horizontal axis and the quantity of good Y on the vertical axis. If indifference curves are bowed inward, as we move from having an abundance of good X to having an abundance of good, Y the marginal rate of substitution of good Y for good X (the slope of the indifference curve)
a. rises.
b. falls.
c. stays the same.
d. could rise or fall depending on the relative prices of the two goods.