The domain of a function is the set of all possible x-values. The range is the set of all possible y-values. Notice that, horizontally, our graph spans from x=-3 to x=3, inclusive. These values are the lower and upper boundaries of our domain.
Domain: -3≤ x ≤ 3
Meanwhile, vertically, our graph spans from y=-1 to y=3, inclusive. These values are the lower and upper boundaries of our range.
Range: - 1≤ y ≤ 3
