So it really is just the slope between the endpoints. So we did the first part. Our average rate of change of f on the interval is negative two sevenths. And then let's think about the second part. They say there's no point c in that interval for which f prime of c is equal to the average rate of change. Explain why the statement does not contradict the mean value theorem. So the mean value theorem, just as a little bit of a review, as a little bit of review, it says that if we have some type of an interval, if you have an interval, so let me draw some axes right over here.