The point P(1, 1/5) lies on the curve y = x/(4 + x). If Q is the point (x, x/(4 + x)), use a scientific calculator to find the slope of the secant line PQ (correct to six decimal places) for the following values of x
(a) 0.5
1.76
X
(b) 0.9
(c) 0.99
(d) 0.999
(e) 1.5
(1) 1.1
(9) 1.01
(h) 1.001