help with limits...and secant lines

Use a table of values to estimate the value of the limit. If you have a graphing device, use it to confirm your result graphically.

http://www.webassign.net/cgi-bin/sym...5E4%20-%201%29

When I graph this, as it is going to 1 it looks like it reaches and passes 0.5...

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The point *P*(1, 1/9) lies on the curve *y* = *x*/(8 + *x*). If *Q* is the point (*x*, *x*/(8 + *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

(b) 0.9

(c) 0.99

(d) 0.999

(e) 1.5

(f) 1.1

(g) 1.01

(h) 1.001

If you could just help me with how to solve these I should be able to work them out myself.