Use the figure below to calculate John's opportunity cost of an hour of tennis when he increase the time he plays tennis from:

a. 2 to 4 hours a week.

b. 4 to 8 hours a week.

C. Describe the relationship between the time John spends playing tennis and the opportunity cost of an hour of tennis.

Use the figure below to calculate John's opportunity cost of an hour of tennis when he increase the time he plays tennis from: a. 2 to 4 hours a week. b. 4 to 8 hours a week. c. Describe the relationship between the time John spends playing tennis and the opportunity cost of an hour of tennis. Y-Values 90 80 70 60 50 Grade in Economics (percent) 40 20 10 0 6 8 10 12 14 16 18 Tennis (hours per week)