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1. The marginal rate of transformation of y for x represents ?

这样子叙述谁是vertical axis谁是horizontal axis的呢？

2. 两个MRS 比大小，是比数值的大小还是比绝对值的大小呀？

3. Suppose that the interest rate paid to savers increases. As a result, Tom wishes to save more This suggests that, for Tom,
a.future consumption ia a luxury.
b.utility maximization is not occuring.
c.the substitution effect is greater than the income effect.
d.the income effect is greater than the substitution effect.

4.Suppose a graph is drawn to show a sonsumer's preferences for football tickets and basketball tickets. The quantity of football tickets. The quantity of football tickets is measured on the horizontal axis. If the price consumption curve is horizontal when the price of football tickets changes, then
a.football tickets are an inferior good.
b.the demand for football tickets is unit elastic.
c.the demand curve for football tickets will be horizontal.
d.the demand for football tickets is perfectly elastic.

5.If Fred's marginal utility of pizza equals 10 and his marginal utility of salad equals 2, then
a.he will eat five times as much salad as pizza.
b.he would give up 5 pizzas yo get the next salad.
c.he will eat 5 times as much pizza as salad.
d.he would give up 5 salads to get the next pizza.

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关键词：微观题 substitution maximization consumption Preferences horizontal represents interest vertical income

2题： MRS是消费者增加一个单位的某种商品的消费数量时所放弃的另一种商品的数量
d X1 / d X2 为负，但为了使结果为正，规定加符号  所以只要比较数值的大小（都是正的）
3题：D
5题：D

第三题应该是c吧