Given the following total-revenue function
TR = 9Q-Q2
a) Derive the total-revenue, average-revenue and marginal-revenue schedules from Q = 0 to Q = 4 by 1s.
Average revenue (AR) = total revenue (TR) / Q
Marginal revenue (MR) = change in total revenue / change in Q
For example Q TR AR MR
2 14 7
3 18 6 4
b) On the same set of axes, plot the total-revenue, averate-revenue and marginal-revenue curves.