Answer:
19.37.
Step-by-step explanation:
Integrating the  function we get
x^4/4 - 5x^3/3 + x^2 + 8x
Area under the curve from x = -1 to x = 0
= (-1)^4/4 - 5(-1)^3/3 + (-1)^2 - 8
= 5.083
In a similar way we calculate area from 0 to 2
this = 10.667.
Total = 15.75.
Now we subtract 12.13 to get the area  from x = 2 to x =p.
= 15.75 - 12.13 = 3.62
So total shaded area = 15.75 + 3.62
= 19.37.
 
        
             
        
        
        
Equation of straight line is y=mx+c ,here m is slope in given question m is 1/4.
Hope it helps you.
        
             
        
        
        
It's another word for unit rate if that helps
        
             
        
        
        
.3, 3 out of 10 are covered making .3, 30%