Select Is a Function or Is not a Function to correctly classify each relation.

Is a Function Is not a Function
{(3, 2),(6, 4),(9, 6),(12, 8)}
Is a Function – left curly bracket begin ordered pair 3 comma 2 end ordered pair comma begin ordered pair 6 comma 4 end ordered pair comma begin ordered pair 9 comma 6 end ordered pair comma begin ordered pair 12 comma 8 end ordered pair right curly bracket
Is not a Function – left curly bracket begin ordered pair 3 comma 2 end ordered pair comma begin ordered pair 6 comma 4 end ordered pair comma begin ordered pair 9 comma 6 end ordered pair comma begin ordered pair 12 comma 8 end ordered pair right curly bracket
{(2, 3),(2, 5),(3, 6),(9, 4)}
Is a Function – left curly bracket begin ordered pair 2 comma 3 end ordered pair comma begin ordered pair 2 comma 5 end ordered pair comma begin ordered pair 3 comma 6 end ordered pair comma begin ordered pair 9 comma 4 end ordered pair right curly bracket
Is not a Function – left curly bracket begin ordered pair 2 comma 3 end ordered pair comma begin ordered pair 2 comma 5 end ordered pair comma begin ordered pair 3 comma 6 end ordered pair comma begin ordered pair 9 comma 4 end ordered pair right curly bracket
{(2, 4),(6, 3),(4, 8),(6, 6)}
Is a Function – left curly bracket begin ordered pair 4 comma 2 end ordered pair comma begin ordered pair 6 comma 3 end ordered pair comma begin ordered pair 4 comma 8 end ordered pair comma begin ordered pair 6 comma 6 end ordered pair right curly bracket
Is not a Function – left curly bracket begin ordered pair 4 comma 2 end ordered pair comma begin ordered pair 6 comma 3 end ordered pair comma begin ordered pair 4 comma 8 end ordered pair comma begin ordered pair 6 comma 6 end ordered pair right curly bracket
{(3, 4),(5, 2),(6, 8),(6, 4)}
Is a Function – left curly bracket begin ordered pair 3 comma 4 end ordered pair comma begin ordered pair 5 comma 2 end ordered pair comma begin ordered pair 6 comma 8 end ordered pair comma begin ordered pair 6 comma 4 end ordered pair right curly bracket
Is not a Function – left curly bracket begin ordered pair 3 comma 4 end ordered pair comma begin ordered pair 5 comma 2 end ordered pair comma begin ordered pair 6 comma 8 end ordered pair comma begin ordered pair 6 comma 4 end ordered pair right curly bracket