And then it'll actually become kind of an easier way to solve the system. You could solve this a million different ways. But just to give us an intuition of what even is going on here. What's another point that's on that line? Because if you have two points on the line, you know what the equation of the line is going to be. Well, the other point, if we want this to be an mx plus b form. So let's divide both sides of this equation by this term right here, by the mean of the x's.