Answer
Domain: $(-\infty,\infty)$
Range: $(-\infty,3]$
Work Step by Step
Domain: $(-\infty,\infty)$
Range: $(-\infty,3]$
The domain is the scope of x-values, and the range is the scope of y-values. A parenthesis () means the value is not included. A bracket [] means the value is included.