To determine whether a relation is a function, you can use different representations such as ordered pairs, a table, a graph, or a mapping diagram. Here’s how each representation helps:

1. Ordered Pairs: If any two ordered pairs have the same first element (input) but different second elements (outputs), the relation is not a function.

2. Table: Similar to ordered pairs, if any input value in the table corresponds to more than one output, then it’s not a function.

3. Graph: Use the Vertical Line Test. If a vertical line intersects the graph of the relation at more than one point, it is not a function.

4. Mapping Diagram: Each input should map to exactly one output. If an input has multiple outputs, it is not a function.

In summary, a relation is a function if each input has a unique output across all representations. If you need further clarification, feel free to ask!