Answer:
what this question make NO sence. please elaborate.
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
The answer is A
Step-by-step explanation:
In order for it to be a function every x value has to have a different y value or every input has to have a different output.
 
        
                    
             
        
        
        
Let the second no. be x
-3x = 21 → x = 21/-3 → x = -7
 
        
             
        
        
        
Answer:
I think A, but i'm not the smartest 
Step-by-step explanation: