Question

How do you find the domain and range for `y=absx`?

Answer 1

There are no values of `x` that would make the function undefined.

Explanation:

So the domain is `x in (-oo,+oo)`

By the absolute bars, `y` can never be negative, but it may be `0`
So the range is `y in [0,+oo)`

(the square bracket meaning "inclusive")