Respuesta :

The following relations below are functions:

#1. {(-5,2),(-1,0),(8,2),(11,-9)}
#2. {(-1,-1),(0,2),(2,-5),(9,6)}
#3. {(3,-6),(4,-6),(8,8),(10,-1)}

In other words, all except choice one. You're welcome! :)
Iknoweverything04
c would be correct ;D

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