Find the average rate of change of y with respect to x from P to Q. Then compare this with the instantaneous rate of change of y with respect to x at P by finding mtan at P. y = 1 - x'; P(2, - 7), Q(2.1, - 8.261) Enter the average rate of change of y with respect to x from point P to Q below. mpQ = (Type an integer or a decimal.)