And so the derivative of this might look like it has to be slightly negative, but then it gets more and more and more and more negative as we approach that vertical asymptote. And in the right side of the vertical asymptote, our derivative is very positive here, and then it gets less and less and less and less and less and less positive. And so we start, our derivative would be very positive, and then it would get less and less and less and less positive. 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.