And they also give us five comma 112. That is that point right over there. And so what we could do, we could say, well, what is the average rate of change between these two points? Another way to think about it is what is the slope of the secant line between those two points? And that would be our best estimate for the slope of the tangent line at x equals four. Do we know that it's a good estimate? Do we know that it's even close?