Drag the point in the square to see how the surface is parametrized with respect to variables [math]u[/math] and [math]v[/math]. Drag the larger blue point to grow the surface, and drag the smaller green point to see the corresponding point on the surface. For simple animation, move the point using your keyboard arrows.

[i]This applet was developed for use with [url=https://www.pearson.com/en-us/subject-catalog/p/interactive-calculus-early-transcendentals-single-variable/P200000009666]Interactive Calculus[/url], published by Pearson.[/i][br]