To plot a new function, choose the Plot New Function command and use the function calculator to define your function. While you’re defining the function, use the Equation pop-up menu to define the form of the plot. (Sketchpad supports several Cartesian and polar equation forms.) When you close the function calculator, both the function and its plot appear.

To plot one or more existing functions on the marked coordinate system, select every function you want to plot and choose Plot Function. Each function is plotted in the form that was set in the function calculator’s Equation pop-up menu at the time you defined that function.