## College Algebra (10th Edition)

The relation represents a function. Domain: $\left\{-1, 2, 4\right\}$ Range: $\left\{0, 3\right\}$
RECALL: (1) A function is a relation if every element of the domain (first coordinate) is paired with exactly one element of the range (second coordinate). (2) The domain of a function is the set that contains all of the first coordinates. The range of a function is the set that contains all of the second coordinates. Note that every first coordinate in the given relation is paired with only one second coordinate. Thus, the given relation is a function. The function has: Domain: $\left\{-1, 2, 4\right\}$ Range: $\left\{0, 3\right\}$