Final answer:
The graph represents a relation that is not a function because there are y-values which are paired with multiple x-values.
Step-by-step explanation:
The graph represents a relation that is not a function because there are y-values which are paired with multiple x-values. In a function, each input (x-value) can only have one output (y-value). However, in this graph, there are multiple points with the same y-value but different x-values. This violates the definition of a function.