We get m times the mean of the x's minus the mean of the x squareds over the mean of x, over the mean of the x's. The plus b and the negative b cancel out, is equal to the mean of the y's minus the mean of the x y's over the mean of the x's. And then we can divide both sides of the equation by this. And so we get m is equal to the mean of the y's minus the mean of the x y's over the mean of the x's over this. The mean of the x's minus the mean of the x squareds over the mean of the x's. Now notice, this is the exact same thing that you would get if you found the slope between these two points over here. Change in y, so the difference between that y and that y is that right over there, over the change in x's.