Relations and Functions Vocabulary

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Independent Variable

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The input number of a function; the 'x' value in an ordered pair.

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Dependent Variable

Back

The output number of a function; the 'y' value in an ordered pair.

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Domain

Back

The set of all possible input values for a function or relation.

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Range

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The set of all possible output values of a function or relation.

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Relation

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Any set of ordered pairs.

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Function

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A special relation where each input corresponds to exactly one output.

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Ordered Pair

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Two numbers that identify the location of a point.

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Mapping Diagram

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Shows how inputs and outputs are paired, like a flow chart.

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Vertical Line Test

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A test used to determine if a graph is a function by checking vertical lines.

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Linear Function

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A function with a graph that is a straight line and constant rate of change.