College Algebra!

Checkpoint Quiz 2.3

Name:

1. The profit, P in thousands of dollars made by selling x hundred Tru-View Media Players is given by

P (x) = −x2 + 40x− 300

(a) Find and interpret P (0).

(b) Solve P (x) = 0 and interpret.

(c) Sketch the graph of y = P (x). Include the vertex, x- and y-intercepts.

(d) What is the maximum profit? How many players need to be sold to maximize profit?

2. Graph f(x) = x |x− 2|.