Respuesta :
The answer should be y=-5x since the inverse is just you flipping it over.
let's recall that to find the inverse of any expression, we start off by doing a quick switcheroo on the variables, and then solve for "y".
[tex]\bf y = 5x\implies \stackrel{switcheroo}{x=5y}\implies \cfrac{x}{5}=\stackrel{f^{-1}(x)}{y}[/tex]