I am completely stuck on this question, thanks for all help.

I am supposed to find the domain and range of the function:

I have solved the domain as

It's been quite a few years since I've worked with domain and ranges, then again one with an absolute value in the denominator.

I know that from it's a horizontal line at y=-1 and that from it's a horizontal line at y=1. How do I write the range for this?