It takes doug 3 days to reroof a house. if doug's son , it can be done in 2 days. how long would it take doug's son to do the job alone?

see attached

step-by-step explanation:

given the function as;

write the equation replacing f(x) with y

form   and fill a table containing values of y with corresponding values of x

you can take a range for   values of x as -3≤x≤3

solving for x=-3

for x=-2

repeat the same procedure to get the values of y for the remaining ,x=-1 to x=3

plot the values of y against values   of x and obtain the following graph

      2

  2 is to go somewhat to the top right of a because it is squared    

v= a h/3

6-3=3

3*3=9

9+12=21

21/3=7

7*8=56

56 is your answer