well, first realize that the function that you want to find the range for is linear
this means that you only need to look at the endpoints of the domain
assuming the domain is
[tex]-2 \leq x\ \&\ 2 \geq x[/tex]
or
[tex]-2 \leq x \leq 2[/tex]
which can be rewritten as [-2,2]
what is y when x=-2
what is y when x=2
your range is the values between those two y values
