### Home > CALC > Chapter 4 > Lesson 4.1.2 > Problem 4-23

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*′(*x*) for the function given. Homework Help ✎

*f*(*x*) has a cusp at *x* = 3, so *x* '(*x*) should have a jump at

*x* = 3.

The max and min on a smooth continuous graph are the location of zeros on the derivative graph.