This interactive figure allows you to enter an upper function [math]f[/math], a lower function [math]g[/math], and limits of integration [i][math]a[/math][/i] and [i][math]b[/math][/i] ranging from -20 to 20. It displays an approximate value of the area between the two curves, and between [math]x=a[/math] and [math]x=b[/math]. [br][br]You can use this interactive figure to check the accuracy of your work done by hand.

[i]Developed for use with Thomas' Calculus, published by Pearson.[/i]