Question

Which function below is the inverse of f(x) = The quantity of two x plus three, over five.?

Answer 1

f(x)=(2x+3)/5

Answer 2

is not it?

Answer 3

let y=f(x)
x=f^-1(y)

Answer 4

y=(2x+3)/5
x=(5y-3)/2
f^-1(y)=(5y-3)/2
f^-1(x)=(5x-3)/2

Answer 5

did u get it