# Is the relation #{(4, 2), (5, 2), (6, 2)}# a function?

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Yes, the relation {(4, 2), (5, 2), (6, 2)} is a function because each input (x-value) corresponds to exactly one output (y-value).

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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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