Let's do another example. And this time we're going to rotate our function. We're going to rotate it around a vertical line that is not the y-axis. And if we do that, so we're going to rotate y is equal to x squared minus 1, or at least this part of it, we're going to rotate it around the vertical line x is equal to negative 2. And if we do that, we get this gumball shape that looks something like this. So what I want to do is I want to find the volume of this using the disk method. So what I want to do is construct some disks.