SOLUTION: please help. this is how the question was asked. im not sure how to put any paranthesis. Given the function f (x) = 8 − 1/7 x , find a formula for the inverse function

Algebra ->  Average -> SOLUTION: please help. this is how the question was asked. im not sure how to put any paranthesis. Given the function f (x) = 8 − 1/7 x , find a formula for the inverse function      Log On


   

Question 1116672: please help. this is how the question was asked. im not sure how to put any paranthesis.
Given the function f (x) = 8 − 1/7 x , find a formula for the inverse function
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!
if you have this:
f+%28x%29+=+8+-%281%2F7+%29x
then inverse is:
f+%28x%29+=+y
-> y=+8+-+%281%2F7+%29x ...swap x and y
x=+8+-+%281%2F7+%29y ...solve for y+
%281%2F7+%29y+=+8-x
y+=+8%2F+%281%2F7+%29+-x%2F+%281%2F7+%29
y+=+56+-7x-> your inverse

+graph%28+600%2C+600%2C+-10%2C+10%2C+-10%2C+10%2C++8+-%281%2F7%29x%2C+56-7x%29+