Answer:
Direct.
Step-by-step explanation:
A varies directly as the square of r.
 
        
                    
             
        
        
        
Answer: 
 y=mx+b is the formula starting with b say it is 4 you put a dot on 4  on the y axis m is 1/2 you go up 1 right 2 on the 4 points then do the same on the next point you get then you get your line. hope this helps  
 
        
             
        
        
        
The answer is x=6. I double checked the work and am 100% sure thats the answer
 
        
                    
             
        
        
        
Your answer is 19 I think