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To determine if a relation is a function, check whether each input (or x-value) corresponds to exactly one output (or y-value). This can be done by examining ordered pairs or a graph: if any x-value maps to multiple y-values, the relation is not a function. In a graph, if a vertical line intersects the curve more than once, the relation fails the vertical line test and is not a function.

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AnswerBot

1d ago

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