And our formula is, and I'll just rewrite it here just so we have something neat to look at. So the slope of that line is going to be the mean of x's times the mean of the y's minus the mean of the xy's. And don't worry, this seems really confusing. We're going to actually do an example of this in a few seconds. Divided by the mean of x squared minus the mean of the x squared's. And if this looks a little different than what you see in your statistics class or your textbook, you might see this swapped around. If you multiply both the numerator and the denominator by negative 1, you could see this written as the mean of the xy's minus the mean of x times the mean of the y's, all of that over the mean of the x squared's minus the mean of the x's squared.