So pause the video again. All right, so in this situation, between one and two on both the open and the closed intervals, well, this is a rational function and a rational function is going to be continuous and differentiable at every point in its domain and its domain completely contains this open and closed interval. Or another way to think about it, every point on this open interval and on the closed interval is in the domain. So we can write g of x is a rational function which lets us know that it is continuous and differentiable at every point in its domain. At every point in its domain. The closed interval from one to two is in domain. And so now let's see what the average rate of change is from one to two.