Domain: the smallest possible x-value to the largest possible x-value
In the case of this graph, we see the parabola starts at x = -3, and continues on forever.
Domain: [-3, infinity)
Range: the smallest possible y-value to the largest possible y-value
In the case of this graph, the parabola will continue to expand forever.
Range: (-infinity, infinity)
Therefore, while the domain has a restriction, the range does not and is all real numbers.
Hope this helps!
