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. The change in that x, that x minus that x is exactly this over here. Now to simplify it, we can multiply both the numerator and the denominator by the mean in x. The mean of the x's.