Table 9-1
Output
Consumption
Investment
Net Exports
1,000
800
500
100
1,500
1,200
500
100
2,000
1,600
500
100
2,500
2,000
500
100
3,000
2,400
500
100
3,500
2,800
500
100
4,000
3,200
500
100
?
In Table 9-1, inventories will be increasing as long as output is above

The unemployment rate can increase when

A) the proportion of 18-22 year olds that go to college increases. B) the number of unemployed workers increases. C) the number of job finders increases. D) the size of the military increases.

Assume that when price is $20, quantity demanded is 9 units, and when price is $19, quantity demanded is 10 units. Based on this information, what is the marginal revenue resulting from an increase in output from 9 units to 10 units?

A) $20 B) $19 C) $10 D) $1