81 - 35+30 (55) = 26 therefore 26cm is ur final answer
        
                    
             
        
        
        
Answer:A
Step-by-step explanation:
the y-intercept is when x-axis is 0 and that means that hours of jogging is 0 and the y-axis is 1 minunte 
 
        
                    
             
        
        
        
Y-y1=m(x-x1)
m= slope =-3
y-y1=-3(x-x1),
y1=-7, x1=5
y--7=-3(x-5)
y+7=-3(x-5) this is C
        
             
        
        
        
Not really sure what exactly you are asking, but maybe a bar graph?