ex 4 The point P(2,-1)lies on the curve y=1/(1-x). If Q ... point (x,1/(1-x), ...slope...secant line

The point P(2,-1)lies on the curve y=1/(1-x). If Q is the point (x,1/(1-x), use your calculator to find the slope of the secant line PQ (correct to six decimal places) for the following values of x: 1.5, 1.9, 1.99, 1.999, 2.5, 2.1, 2.01, and 2.001.