## anonymous 4 years ago what is the inverse function of 7x+4 ( this is a one to one function) ??

1. anonymous

it is one to one because the graph is a line

2. anonymous

suppose you had to solve $7x+4=25$ what would you do? subtract 4 then divide by 7 that is what the inverse function does, find the input when you know the output, so it is $f^{-1}(x)=\frac{x-4}{7}$