Consider the curve y = x2 + 2x + 6. (a) Find the slope of the secant line to the curve through the points where x = 3 and x = 3 + h. (b) Use your answer from part (a) to find the slope of the tangent line at the point where x = 3. (c) The equation of the tangent line at the point where x = 3 is y =