Answer:
a
Step-by-step explanation:
because the rest aren't true
 
        
                    
             
        
        
        
Answer:
17 
Step-by-step explanation:
We can use this formula: 
 where x and y indicate the coordinates of the two points
 where x and y indicate the coordinates of the two points 

 
        
                    
             
        
        
        
No.5=1/3x=21
So x is twenty one21
        
             
        
        
        
There is no graph to figure this out...