### Home > CALC > Chapter Ch9 > Lesson 9.4.2 > Problem 9-122

9-122.

This occurs when *f*′(*x*) changes from negative to positive.

This occurs when the slope of *f*′(*x*) is 0.

What is the slope of the given graph at *x* = 4.8?

At *x* = 5?

At *x* = 5.2?

Review your answer to part (b).