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Given the function?

0 votes

Given the function f(x)=9x+7, find its inverse. 


A. f^-1(x)=(x-9)/7 

B. f^-1(x)=x/9-7 

C. f^-1(x)=(x-7)/9 

D. f^-1(x)=x/7-9

asked Jul 16, 2014 in ALGEBRA 1 by anonymous

1 Answer

0 votes

The function image

Change f(x) to y.

image

Interchange x and y  .

image

Now solve for y.

image

image

image

Replace y  by image.

image

Option C is correct answer.

answered Jul 16, 2014 by david Expert

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