And we looked at our change in y, which would be this right over here. And we calculated change in y over change of x for average rate of change. Now this might be looking fairly familiar to you, because you're used to thinking about change in y over change in x as the slope of a line connecting two points. And that's indeed what we did calculate. If you were to draw a secant line between these two points, we essentially just calculated the slope of that secant line. And so the average rate of change between two points, that is the same thing as the slope of the secant line. And by looking at the secant line in comparison to the curve over that interval, it hopefully gives you a visual intuition for what even average rate of change means.