Homer consumes only donuts and beer. When he consumes less than 10 beers, Homer would gladly drink one more. After drinking 10 beers, Homer is so drunk that he does not notice any additional bottle he drinks (that is, the benefit of an additional bottle of beer is zero). Drinking more than 17 beers is beyond the processing capability of Homer’s liver and any additional bottle makes him sick (beer is no longer a “good” for Homer). Homer’s preferences for donuts are somewhat similar. As long as he eats less than 15 donuts, an additional donut increases his utility. If he eats more than 15 donuts, then additional donuts make him worse off.
Sketch Homer’s indifference curve passing through point (8 donuts, 8 beers).
Sketch Homer’s indifference curve passing through point (15 donuts, 16 beers)
Hint: For each of the above questions, it is possible to (and you should!) sketch Homer’s entire indifference curves.