We get b is equal to the mean of the y's minus m times the mean of the x's. So what you do is you take your data points, you find the mean of the x's, the mean of the y's, the mean of the x y's, the mean of the x's squared. You find your m. Once you find your m, then you can substitute back in here and you find your b. And then you have your actual optimal line. And we're done. So these are the two big formula takeaways for our optimal line. What I'm going to do in the next video, and this is where you can kind of, if anyone was skipping up to this point, the next video is where they should reengage.