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11. {(-1,7),(0, -3), (1,10), (0,7)}12. {(1/2,2),(1/4,2),(1/8,2),(-1/2)}Is this relation a function

User Ress
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11.- it's a relation, because one "x" is repeated

12.- it's a function, because there is no repeated "x"

User Speerian
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