So what do I mean by that? So let me, this is actually a fun thing to do. Let me start again. That's exactly what we have over here. This is the graph of y is equal to f of x. But what I want to do is I want to approximate the graph of y is equal to, so my goal is to graph y is equal to f of x, f of x plus g of x, plus g of x, plus g of x. So for any given x, it's going to be f of x, so that's the f of x, and I'm going to add the g of x to it.