This Interactive Figure demonstrates the family of quartic surfaces given by the equation[br] [math]x^2+y^2=z^2+g[/math][br]as the constant [math]g[/math] changes.

[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]