The answer is:
(1,4) into (5,2)
(3,1) into (7,-1)
(1,1) into (5,-1)
The equation is y = -3/2
this is because the line crosses zero on the Y axis so there is no Y intercept
and to get the slope you just see how many units down & then right you need to get from the center point to the one more down
By definition, the area of a rectangle is:

Where,
w: width of the rectangle
l: length of the rectangle
The total area is given by:

Where,
A1: rectangular wooden board 1
A2: rectangular wooden board 2
Substituting we have:

Rewriting we have:




Answer:
The width is given by:

6+2s-8s=18
6-6s=18
-6s= 18-6
-6s= 12
S= 12/-6
S= -2
Hope this helps!