Answer
$\text{Domain:}\;\{\text{Carol}\}$
$\text{Range:}\;\{22400,23700,25200\}$
$\text{No, this relation is not a function.}$
Work Step by Step
The domain of a relation is the set of $x$ values for that function. In this relation, the set of $x$ values is $\{\text{Carol}\}$. The range of a relation is the set of $y$ values for that relation. In this relation the set of $y$ values is $\{22400,23700,25200\}$. A relation is a function if each $x$ value has only one unique $y$ value. Since $\text{Carol}$, an element of the domain, is repeated with multiple $y$ values, this relation is not a function.
