Use the Graph of the Derivative Function to Determine Concavity and Location of Points of Inflection

This video explains how to determine concavity and location of points of inflection by analyzing the graph of the derivative function.

Use the Graph of the Derivative Function to Determine Incr/Decr Intervals and Location of Relative Extrema

This video explains how to determine where a function is increasing or decreasing  and the location of relative extrema by analyzing the graph of the derivative function.