In the case shown to the right, our consumer's income (or available funds for entertainment) has been cut in half to $600. If she spends all her money on Movies, at $40 per evening, she can only go to 15 each year, instead of the 30 she could afford before. Since price hasn't changed the slope is still -2/3, so for every 2 evenings at her favorite club she gives up, she can afford 3 more movies.
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