Help me solve?
f-1(4) when f(x) = 3x minus 4, all over 5

Question

Help me solve? 
f-1(4) when f(x) = 3x minus 4, all over 5

anonymous · Answer

So far I got...
f(x) = 3x - 4 / 5
f(-1) = 3(-1) - 4 / 5

anonymous · Answer

Are you looking for the inverse or f(-1)?

From what I can tell is, you need the inverse the notation of inverse is often this: $$f^{-1}(x)$$ so is this what you're looking for, if so f(-1) has nothing to do with it.

anonymous · Answer

Here are a few rules for the inverse, 

To find the inverse:

Replace f(x) with y
Switch x's and y's, so put x where y is and x where y is.
Solve for y
Replace y with f^-1(x)

anonymous · Answer

I don't understand how the new equation would be set up.. @iambatman

anonymous · Answer

You didn't answer my question yet, are we doing inverses?

anonymous · Answer

I believe so...I put exactly what my question says.@iambatman

anonymous · Answer

@iambatman