Rita makes $150 a day as a bank clerk. She takes off two days of work without pay to fly to another city to attend the concert of her favorite music group. The cost of transportation for the trip is $250. The cost of the concert ticket is $50. The opportunity cost of Rita's trip to the concert is:

Refer to Table 10-2. Holding prices constant, when Keira's income changed from $18 to $23, what happens to her total utility and to the marginal utilities of the last cup of soup and the last sandwich purchased?

A) Her total utility and the marginal utility of the last sandwich consumed increase but marginal utility of the last cup of soup consumed decreases. B) Her total utility and the marginal utility of the last cup of soup consumed increase but marginal utility of the last sandwich consumed decreases. C) Her total utility decreases but the marginal utilities of the last cup of soup and the last sandwich consumed increase. D) Her total utility, the marginal utility of the last cup of soup consumed, and the marginal utility of the last sandwich consumed all increase. E) Her total utility increases but the marginal utilities of the last cup of soup and the last sandwich consumed decrease.

If the rate of inflation in the economy is steady at 5 percent per year, how does the short-run Phillips curve predict that the unemployment rate will be changing, if at all? Does your answer change if inflation in the economy is 0 percent?

Illustrate your answer with a Phillips curve.