Answer:
Domain and range: all reals Inverse | Inverse: y=(x+1/2)/3
The steps are:
it is a linear function which means there are no domain or range restrictions;
the inverse is just the x and the y flipped then you solve for y again
y=3x-1/2
x=3y-1/2
x+1/2=3y
(x+1/2)/3=y