9 In Example 2 on page 92, there is a table of secant line slopes between point (0.04, 67.03) and other given points in the left column. Why does the author choose the slopes involving the points (0.02, 81.57) and (0.06, 54.88) to estimate the slope of the tangent line at (0.04, 67.03)? Why not choose the other points? Later, the author estimates the same tangent line slope by finding the slope of a drawn tangent line to the graph. Though both methods give estimates of the tangent line slope, which method is better? Explain in a couple of complete sentences