SOL review Relations, Functions and Variations

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What is a direct variation?

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What is an inverse variation?

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How do you determine if a relation is a function?

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A relation is a function if every input (x-value) has exactly one output (y-value). This can be checked using the vertical line test on a graph.

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What is the domain of a function?

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The domain of a function is the set of all possible input values (x-values) for which the function is defined.

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What is the range of a function?

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The range of a function is the set of all possible output values (y-values) that the function can produce.

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What does the vertical line test determine?

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The vertical line test determines whether a graph represents a function. If a vertical line intersects the graph at more than one point, the graph is not a function.

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8

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It means that the output values (y-values) of the function can take any value from -3 to 3, inclusive.