The answer is y=0
See the attached photo for details 
Hope this helps! Please make me the brainliest, it’s not necessary but appreciated, I put a lot of effort and research into my answers. Have a good day, stay safe and stay healthy.
 
        
        
        
I hope this helps. If you don’t understand it I will explain it again
 
        
        
        
81-1= 80
80 / 2 = 40
D = 40
So:
40(2) = 81 - 1
        
             
        
        
        
Answer:
C. (0, 7)
Step-by-step explanation:
Just use a graphing calculator.