1. The problem asks us to determine if the relation shown in the graph is a function. 2. A function is defined as a relation where each input (x-value) has exactly one output (y-value). 3. The graph shows a vertical line passing through the y-axis, meaning it has the same x-value for multiple y-values. 4. This means one input (x) corresponds to multiple outputs (y), which violates the definition of a function. 5. Therefore, the relation is not a function because at least one input has more than one output. 6. The correct statement is option C: "The relation is not a function because at least one input has more than one output."