Section 3.2-Graphing f from graph of "random" f'(x).
From the graph of the derivative, we should be able to graph the function (look for where f'(x)>0 to know where the function is increasing and where f'(x)<0 to know where the function is decreasing). We really only need the SIGN of f' to graph the function.
There is another version where you can enter the derivative to work with.