D.$40 a week

正确答案：$100 a week

6、Sir Plus has a demand function for mead that is given by the equation D（p） = 100-P.If the price of mead is 75， how much is Sir Plus'；s net consumer surplus？

A.25

B.312.5

C.625

D.156.25

正确答案：312.5

7、Sam has quasilinear preferences and his demand function for x is D（p） = 15-p/3.The price of x is initially $15 per unit and increases to $24 per unit.Sam'；s change is consumer surplus is the closest to：

A.-168

B.-76

C.-27

D.75

正确答案：-76

8、At the initial prices， Teodoro is a net seller of apples and a net buyer of bananas.If the price of apples decreases and the price of bananas does not chang

E.

A.the compensating variation must be negative and the equivalent variation positive.

B.the compensating variation must be positive and the equivalent variation negative.

C.both the compensating variation and the equivalent variation must be positive.

D.both the compensating variation and the equivalent variation must be negative.

正确答案：both the compensating variation and the equivalent variation must be positive.

9、Ella'；s utility function is min{4x，y}.If the price of x is 15 and the price of y is 20， howmuch money would she need to be able to purchase a bundle that she likes as well as the bundle（x，y） =（5，8）？

A.92

B.198

C.190

D.235

正确答案：190

10、Sam'；s utility function is U（x，y）=2x + y where x is the number of x'；s he consumes per week and y is the number of y'；s he consumes per week.Sam has $200 a week to spend.The price of x is 4.Sam currently doesn'；t consume any y.Sam has received an invitation to join a club devoted to consumption of y.If he joins the club， Sam can get a discount on the purchase of y.If he belonged to the club he could buy y for $1 a unit.How much is the most Sam would be willing to pay to join this club？

A.nothing

B.$100 a week

C.$50 a week

D.$40 a week

正确答案：$100 a week

第八章单元测试

1、The inverse demand curve P（x） for a good x measures the price per unit at which the quantity x would be demandeD.。

A.正确

B.错误

正确答案：正确

2、If a price changes， then changes in consumption at the intensive margin are changes that happen because consumers alter the amounts that they consume， but do not either stop consuming or start consuming the gooD.。

A.正确

B.错误