Business: CD Sales (68 continued) a. Graph the sales function S(x) given in Exercise 6...

Business: CD Sales (68 continued)

a. Graph the sales function S(x) given in Exercise 68 on the window [0, 2] by [0, 12]. TRACE along the sales curve to see how the sales rise and then fall as x, the number of months, increases.

b. To check your answer to Exercise 68, use the “dy/dx” or SLOPE feature of your calculator to find the slope (rate of change) of the curve at x = 1. Your answer should agree with your answer to Exercise 68.

c. TRACE along the curve to estimate the maximum sales.

REF PRB:

Business: CD Sales Suppose that after x months, monthly sales of a compact disc are predicted to be Find the rate of change of the sales after 1 month.