So you can see that if our line, if our best fitting line is going to be y is equal to mx plus b, we still have to find the m and the b. But we see on that best fitting line, because the m and the b that satisfy both of these equations are going to be the m and the b on that best fitting line. So that best fitting line actually contains the point. It actually contains the point. And we get this from the second equation right here. It contains the point, or the point, I should write it this way, the coordinate mean of x, mean of y, lies on this point. I should say lies on the line.