4. Method of Approximation. We can estimate the slope of the tangent line by nding the slope of the secant line using points that are near to the point of tangeney. Let f (as) = 2:2 (a) Sketch a graph of f. (b) Estimate the slope of the the line that goes through the following pairs of points: 1- (0,f(0)) and (2,f(2)) ii. (.25,f(.25)) and (1.75, f(1.75)) iii. (.5, f(.5)), and (1.5,f(1.5)) (c) What are your observations