In this activity students practice identifying the Graphs of f, f ', and f ''. Students analyze three graphs, one blue, one black, and one red, superimposed on the same coordinate grid to determine which is the graph of original function, the graph of first derivative, and the graph of the second derivative. The activity does not require differentiation, but requires students to understand increasing, decreasing, relative extrema, and concavity. Many of the examples will lead to great discuss