Final answer:
The given relation is not a function because there are multiple y-values paired with a single x-value.
Step-by-step explanation:
A relation is a function if each input value (x-value) is paired with exactly one output value (y-value). In the given relation, all the ordered pairs have the same x-value, which is 3. However, they have different y-values: 7, 8, -2, 4, and 1. This means that there are multiple y-values paired with a single x-value, making it not a function.