SOLUTION: PLEASE HELP: For the function defined by f(x)=5x-4, find a formula for f^-1(x).

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Question 55288: PLEASE HELP:
For the function defined by f(x)=5x-4, find a formula for f^-1(x).
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
f(x)=5x-4, find a formula for f^-1(x).
Interchange x and y to get:
x=5y-4
solve for y as follows:
y=(1/5)(x-4)
y=(1/5)x-(4/5)
Cheers,
Stan H.