Question 642926: Is the relation {(1,3),(-4,0),(3,1),(0,4),(2,3)} a function? Why or why not?
Answer by jim_thompson5910(35256)   (Show Source):
You can put this solution on YOUR website! Since each x value maps to one and ONLY ONE y value, this means that this given relation is indeed a function.
If we had x = 2 mapping to both y = 3 and y = 4 at the same time, then this wouldn't be a function (since this x value is mapping to more than one y value). But that's not the case here.
So again, this relation is a function.
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Summary
Is the relation {(1,3),(-4,0),(3,1),(0,4),(2,3)} a function? Yes
Why or why not? See explanation above
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