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I really need someone to help me out
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I really need someone to help me out

I really need someone to help me out-example-1
User RedPixel
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All it takes for a relation to be a function is for each possible first number of a pair there's only one possible second number.


So if any of the sets has two pairs with the same first number, that one's not a function.


The last one has (3,2) and (3,5) so isn't a function.



User Manuell
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