The following table describes the relationship between the number of hours Ann studies and the test score she earns. This is a production function with test score as output and study time as the variable input. Use this information for problems 1 and 2.

Study Points

0 30

1 50

2 75

3 81

4 85

5 87

1. If Ann studies 3 hours for the test the average productivity of her labor is

a. 27 B. 30 C. 9 D. 81

2. Diminishing marginal productivity of studying begins

A. after the second hour of study.

B. after the third hour of study.

C. after the fourth hour of study.

D. right when she starts studying.

E. after 1 hour of study