Consider the equation and the given point. f(x) (x-4)(x+8), (1, -27) (a) Find an equation of the tangent line to the graph of f at the given point. y = (b) Use a graphing utility to graph the function and its tangent line at the point. Use the tangent feature of the graphing utility to confirm your results. y -2 -10 -20 30 40 2 6 -50 -6 -2 y 50 -6 -2 -10 40 20 10 10 -20 50 2 40 y 30 38 20 -40 -50 X -2 2 O 10 2