The quantity, q, of a certain skateboard sold depends on the selling price, p, in dollars, so we write q = f(p). You are given that f(100) = 14,000 and f'(100) = -120.
(a) What do f(100) = 14,000 and f signify?
a) The selling price
b) The quantity of skateboards sold
c) The cost of production
d) The profit