### Home > PCT > Chapter Ch9 > Lesson 9.3.4 > Problem 9-142

9-142.

Testing small values of *h* yields *f* '(3) ≈ 5.545. The slope of the function is 5.545 at 3 or the slope of tangent line at *x* = 3 is 5.545.

This tells you the function is increasing at that point.