So 3, well let's do it over here. Let's do 4, 3 just so we can actually fit it on the page. So 4, 3 is going to be something right over here. So this is 4, 3. So those are our 3 points and what we want to do is find the best fitting regression line, which we suspect is going to look something, we'll see what it looks like, but I suspect it's going to look something like that. We'll see what it actually looks like using our formulas, which we have proven. So a good place to start is just to calculate these things ahead of time and then just substitute them back into the equation.