It is a cuz to  be a function the x (domain) can only have one y (range)  in d it is the number 2 in the 2nd and fourth set of ordered pairs in c it is 3 the first one and the 3rd in b it is -1 its the first and the last one 
hope i helped you if u dont mind can i have brainlest <span />
        
             
        
        
        
-1  ,  1 ..........................................................
        
                    
             
        
        
        
Answer:
 47........... 
 hahaha hope it it's right
 
        
             
        
        
        
Answer:
56 packs 
Step-by-step explanation:
1) (14*24 ) - packets of macaroni altogether.
2) repack into packs of 6.
(14*24)/6 = 56 packs