Posted by **ladybug** on Saturday, October 6, 2012 at 1:56pm.

the function f(x)=4/x-7 is one to one

a. find the inverse of f

b. graph f, f^-1, and y=x on the same set of axes

find the inverse of f

f^-1(x)=

- pre-calculus -
**Steve**, Saturday, October 6, 2012 at 2:34pm
y = 4/x - 7

x = 4/(y+7)

so, f(x) = 4/x - 7

f^-1(x) = 4/(x+7)

do the graphs here:

http://rechneronline.de/function-graphs/

If yu meant y = 4/(x-7), of course, things are different.

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