To Function or Not To Function

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It's not a function because a vertical line hits it twice.

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It is a function because each x has only one y.

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It is a function because each x has only one y.

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Not a Function

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Which graph does NOT pass the vertical line test? Options: Graph 1, Graph 2, Graph 3, Graph 4

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Graph 1

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Is a relation always a function?

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FALSE

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What test do we use to see if a relation is a function?

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The Vertical Line Test

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Not a Function

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Function

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Not a Function