3.22 If we graph Mary Granola's indifference curves with avocados on the horizontal axis and grapefruits on the vertical axis, then whenever she has more grapefruits than avocados, the slope of her indifference curve is -2. Whenever she has more avocados than grapefruits, the slope is -1/2. Mary would be indifferent between a bundle with 11 avocados and 23 grapefruits and another bundle that has 19 avocados and:
(a) 15 grapefruits. (b) 19 grapefruits. (c) 11 grapefruits. (d) 13 grapefruits. (e) 14 grapefruits.
Ans.: D
can some1 explain how we got this?

Question

3.22 If we graph Mary Granola's indifference curves with avocados on the horizontal axis and grapefruits on the vertical axis, then whenever she has more grapefruits than avocados, the slope of her indifference curve is -2. Whenever she has more avocados than grapefruits, the slope is -1/2. Mary would be indifferent between a bundle with 11 avocados and 23 grapefruits and another bundle that has 19 avocados and:
(a) 15 grapefruits. (b) 19 grapefruits. (c) 11 grapefruits. (d) 13 grapefruits. (e) 14 grapefruits.
Ans.: D
 can some1 explain how we got this?