What is the inverse of this rational function?

y = -2/(4x-8)       SOlve for 'x'

4x-8 = -2/y

4x = -2/y   +  8     divide by 4

x = -2/(4y)   + 2     change  x  and y

y = -1/(2x) + 2  

Here is a graph:

Is that  (-2/4) x     or is it    -2/(4x)    ?