But now that we have an intuition for these things, hopefully you appreciate this isn't just coming out of nowhere and it's some strange formula. It actually makes intuitive sense. Let's calculate it for this particular set of data. M is going to be equal to r, 0.946, times the sample standard deviation of y, 2.160, over the sample standard deviation of x, 0.816. We can get our calculator out to calculate that. So we have 0.946 times 2.160 divided by 0.816. It gets us to 2.50.