SOLUTION: How to separate funcctions from relations?

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Question 565175: How to separate funcctions from relations?
Answer by ad_alta(240) About Me  (Show Source):
You can put this solution on YOUR website!
Functions are mathematical "rules" which assign exactly one number in the range for each number in the domain. Relations are much less strict. They are simply any set of ordered pairs. It doesn't matter if the "x" part of the pairs are associated with more the one "y" or not.