Function/Not a Function

Which table does NOT show y as a function of x?

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Which representation does not show y as a function of x?

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Which set of ordered pairs represents y as a function of x?

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Which set of coordinates describes a function?

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Which of the following tables is NOT a function?

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The set of ordered pairs {(2,5), (6,9), (10,4), (x,y)} represent a function. Which of the following could NOT represent (x,y)?

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Which of the following represents a function

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Which of the following represents a function?

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