As you've learned in class, we are often interested in finding the signed area under the graph of a function [math]f(x)[/math] from [math]x=a[/math] to [math]x=b[/math]. We can approximate this area using left-hand and right-hand sums. This applet helps you to do just that. To use: enter your function and endpoints of the interval in the boxes labeled f(x), a, and b.