CPM Homework Help : CALC Problem 4-23

For parts (a) and (b) below, trace $f(x)$ on your paper. Then, using a different color pencil or highlighter, sketch the graph of $y = f^\prime(x)$ for the function given.

Hint (a):
$f(x)$ has a cusp at $x = 3$ , so $x^\prime(x)$ should have a jump at $x = 3$ .

Hint (b):
The max and min on a smooth continuous graph are the location of zeros on the derivative graph.