We just didn't see it. It fell off of the part of the graph that we actually showed. So I would actually say that this is a good candidate for being, the third function is a good candidate for being the derivative of the first function. So maybe we could say that this is f and that this is f prime. Now let's look at the second graph. What would its derivative look like? So over here, our slope is quite negative, and it becomes less and less and less negative until we go right over here where our slope is zero.