Answer
Option 'b'
Work Step by Step
The indifference curve measures the relative quantity of two distinct goods, X & Y. The goal of the indifference curve is to show equal trade offs between the purchase of one good and another. Most importantly, though, the slope of the indifference curve shows the marginal rate of substitution of a good, which is the rate by which a consumer can give up the consumption of one good for another.
