When your curves are defined by functions of y rather than functions of x, it is more convenient to use a horizontal representative rectangle. In such a case, we will be integrating with respect to y instead of x. Duration: 17:03

Sketching the graph of a function y can be challenging. Remember that you can switch the x and the y variables, then graph the inverse of the result. Give that a try on Example 8, then find the indicated area.

If your graph in any way resembles the thumbnail below, you're on the right track. Now you just have to complete the problem with a generous application of algebra, arithmetic, and you know, calculus. Duration: 10:10