# college algebra

for the function f(x)=7/x+6, find the average rate of change of f from 1 to x.

1. Steve

f(x) - f(1)
------------
x-1

7/(x+6) - 1
-------------
x-1

7 - (x+6)
-----------
(x-1)(x+6)

1-x
--------------
(x-1)(x+6)

-1/(x+6)

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