The point
P(7, −4)
lies on the curve
y = 4/(6 − x).
(a) If Q is the point
(x, 4/(6 − x)),
use your calculator to find the slope
mPQ
of the secant line PQ (correct to six decimal places) for the following values of x.
(i) 6.9
mPQ =

Question

The point 
P(7, −4)
 lies on the curve 
y = 4/(6 − x).
(a) If Q is the point 
(x, 4/(6 − x)),
 use your calculator to find the slope 
mPQ
 of the secant line PQ (correct to six decimal places) for the following values of x.
(i)    6.9
mPQ =

anonymous · Answer

slope formula

anonymous · Answer

change in $x$ is $7-6.9=.1$ 
find the change in $y$ and multiply by 10