Answer: Yes it is a function.
This is because any x input leads to exactly one y output. 
The graph passes the vertical line test. It is impossible to draw a single vertical line through more than one point on the parabolic curve. 
 
        
             
        
        
        
I hope this helps you 
[2×4+1/4]×(-8)
[8+1/4]×(-8)
9×-8/4
9×-2
-18
        
             
        
        
        
Answer:
A
Step-by-step explanation:
he is riding at a rate of 4 in one and the others do not match 4 in 1
Hope this helps
 
        
                    
             
        
        
        
Answer:
SELENA IS THE BEST SINGER IN THE WORLD OTHER THAN NICKI MINAJA
Step-by-step explanation:
 
        
                    
             
        
        
        
The first and the 2nd one are correct because x is 21 and y is 49
3 and 4 at wrong