The rate of change is -6 because it’s being subtracted by 6 each time.
        
                    
             
        
        
        
M-5-(-12) would equal m+7 because there is a negative before the parentheses and in the parentheses which means you would change it to a positive so, negative 5 plus positive 12 is 7 and since the 7 is positive you would add m (hope this helped)
        
             
        
        
        
(6,8) is the answer also this could be the answer too (6,2) 
hope this helps