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Answer :

A, C functions. B not a function

1) Let's check that using a diagram. Since for each input (x) on the Domain corresponds an output on the Range.

This is a function since each entry on the Domain corresponds to one and only output on the Range,.

Not a function.

This is a function since each entry on the Domain corresponds to one and only output on the Range,

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View image KeariA332893
View image KeariA332893