## Intermediate Algebra (12th Edition)

$\text{ a function }\\\text{Domain: all real numbers} \\\text{Range: }-2$
$\bf{\text{Solution Outline:}}$ To determine if the given graph is a function, use the Vertical Line Test. $\bf{\text{Solution Details:}}$ A vertical line drawn anywhere will intersect the given graph in only $1$ point. Hence, the given is a function. The domain is the set of all $x$-values, while the range is the set of all $y$-values. Hence, the given set of points has the following characteristics: \begin{array}{l}\require{cancel} \text{ a function }\\\text{Domain: all real numbers} \\\text{Range: }-2 .\end{array}