# pre-calculus

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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 -

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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