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Review Calculus I: Problem 9 Previous Problem Problem List Next Problem (1 point) Let f (x ) = x2 - 2x. (A) Find the slope of the secant line joining (1, f (1) ) and (9, f (9) ). Slope of secant line = (B) Find the slope of the secant line joining (5, f (5 ) ) and (5 + h, f (5 + h)). Slope of secant line = (C) Find the slope of the tangent line at (5, f (5) ). Slope of tangent line = (D) Find the equation of the tangent line at (5, f (5) ). y