P (121,8) 4 The point P PQ for the following values of z. lies on the curve y = If Q is the point find the slope of the secant line H 40 If z=0.6, the slope of PQ is: 3 and if x = 0.51, the slope of PQ is: -18 and if x = 0.4, the slope of PQ is: -20 and if x = 0.49, the slope of PQ is: -18 X Based on the above results, guess the slope of the tangent line to the curve at P(0.5, 8). -16