Retake Unit 2 Test STUDY WORK

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Front

Which set of ordered pairs is a function? Options: {(9,5), (10,5), (9,-5), (10,-5)}, {(3,4), (4,-3), (7,4), (3, 8)}, {(6,-5), (7, -3), (8, -1), (9, 1)}, {(2, -2), (5, 9), (5, -7), (1, 4)}

Back

The set {(6,-5), (7, -3), (8, -1), (9, 1)} is a function because each input has a unique output.

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What is a function?

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A function is a relation where each input (x-value) has exactly one output (y-value).

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Identify 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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Identify 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 it mean for y to be a function of x?

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It means that for every value of x, there is exactly one corresponding value of y.

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What is the difference between a function and a relation?

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A function is a specific type of relation where each input is associated with exactly one output.

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How do you determine if a table represents y as a function of x?

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Check if any x-value is repeated; if it is, then y is not a function of x.

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