Let at) 2 1:2 31:. (A) Find the slope of the secant line joining (2, f(2)) and (9, f(9)). Slope of secant line = f, (B) Find the slope ofthe secant linejoining (5, f(5)) and (5 | h, f(5 | h)). Slope of secant line = f. (C) Find the slope of the tangent line at (5, f (5)) Slope of tangent line = f, (D) Find the equation of the tangent line at (5, f(5)). y: if