# 1 Let f(x) = 56 - 22 The slope of the tangent line to the graph of f(x) at the point (-7, 7) is The equation of the tangent line to the graph of f(x) at (-7, 7) is y = ma + b for m = and b = Hint: the slope at x = -7 is given by f ( - 7 + h) - f(-7) m = lim h -+0 h #2 Let f(x) = x2 + 6x. (A) Find the slope of the secant line joining (3, f(3)) and (8, f(8)). Slope of secant line = 17 (B) Find the slope of the secant line joining (6, f(6)) and (6 + h, f(6 + h)). Slope of secant line = (C) Find the slope of the tangent line at (6, f(6)). Slope of tangent line = (D) Find the equation of the tangent line at (6, f(6)). y =