Answer:
i think its B.............................
 
        
             
        
        
        
Step-by-step explanation:
Hope this helps, happy learning
 
        
             
        
        
        
Answer:
need better explanation for this
 
        
             
        
        
        
Answer:
not a function.
Step-by-step explanation:
the x value/set a has to have 1 line from each but the -3 has 2 lines, therefore not a function