## Precalculus (6th Edition)

The given relation defined a function. domain: $[-2, 2]$ range: $[0, 4]$
Note that all vertical lines will pass through the graph in at most one point. This means that the graph pass the vertical line test. Thus, the given graph represents a function. The graph covers the x values from $-2$ to $2$. This means the domain is $[-2, 2]$. The graph covers the y values from $0$ to $4$ This means the range is $[0, 4]$.