Question

domain : ______
range : ______

Explanation:

Step1: Identify domain from graph

The graph has an open circle at $x=3$, meaning $x$ cannot equal 3, and extends infinitely to the right. So the domain is all real numbers greater than 3.

Step2: Identify range from graph

The graph has an open circle at $y=3$, meaning $y$ cannot equal 3, and extends infinitely upward. So the range is all real numbers greater than 3.

Answer:

Domain: $x > 3$ or $(3, \infty)$
Range: $y > 3$ or $(3, \infty)$