SOLUTION: Is this relation a function? {(0,5),(1,10),(2,15),(1,20)}

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Question 40190: Is this relation a function? {(0,5),(1,10),(2,15),(1,20)}
Answer by fractalier(6550) About Me  (Show Source):
You can put this solution on YOUR website!
A relation.
Notice that there are two different y-values for x = 1.
Can't be a function because of that...