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=-5 to x=5, inclusive. These values are the lower and upper boundaries of our domain.
Domain: -5≤ x ≤ 5
Meanwhile, vertically, our graph spans from y=0 to y=5, inclusive. These values are the lower and upper boundaries of our range.
Range: 0≤ y ≤ 5
