Answer
Width: $1000$
Height: $300$
Work Step by Step
Use range to find the height and domain to find the width.
The domain is $-500\leq x\leq 500$
So the width is $|-500|+|500|=500+500=1000$
The range is $-300\leq y\leq 0$
So the height is $|-300|=300$