Consider the function f(x) = 6x - x2 and the point P(2, 8) on the graph f. Find the secant lines through P(2, 8) and Q(x, f(x) ) for a values of 3 ,2.5 , and 1.5 : Part 1 Slope of the Secant line at x value 3 is m1 = Slope of the Secant line at x value 2.5 is m2 = 1.5 Slope of the Secant line at x value 1.5 is m3 = 2.5 Part 2 Use the results of Part 1 to estimate the slope of the tangent line to the graph of f at P(2, 8). The approximate slope of the tangent line to the gaph of f at P(2, 8) is m4 = Part 3