It looks like it might, the slope here might be asymptoting towards zero. So our graph might look something like that. Well, the left graph right here looks a lot like what I just sketched out as a candidate derivative for this blue graph, for this middle graph. And so I would say that this is f, then this is the derivative of that, which would make it f prime. And then we already established that this right graph is the derivative of the left one. So if it's the derivative of f prime, it's not f prime itself, it's the second derivative. So I feel pretty good about that.