Your domain would be your x-value which in this case is all real numbers and your range your y-value 
The Brainliest Answer!
Domain is All real numbers

Why? The parabola always have the domain of all real numbers. If you see it on the graph, you can see the parabola always extending the negative infinity or positive infinity on the x axis.

Range is . .. Y Greater or less than 3

Why? This parabola points one way on the graph, its pointing up since it has a positive coefficient. The restriction is below, which stops at +3, but extends to infinity on the y axis. We can conclude that this infinity will be any number being 3 or above 3.
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