The Formula element shows the graphs of a function, its inverse, or a parametric curve. The function or functions are defined by column formulas.
:
x = f(t) and y  = g(t): To plot the parametric curve defined by two functions, drag one to the X zone and the other to the Y zone.
Figure 2.40 Formula Options
Tip: If you have multiple graphs, you can color or size each graph by different variables. Drag a second variable to the Color or Size zone, and drop it in a corner. In the Variables option, select the specific color or size variable to apply to each graph.

Help created on 10/11/2018