But it gave us this nice equation. Now we can use this nice equation to predict things. If we say that this is a good model for the data, let me bring this down a little bit, let's try to answer our question. So we drew a scatter plot, really Excel did it for us. We found the equation right there. They say, what would you expect the median annual income of a California family to be in the year 2010? So here we can just use the equation they gave us.