You have to find the area of each face and add them all together. You also need to find the unknown side which is indicated in the picture i attached.
Answer:
the corresponding point for function f(x) + 2 would be (12, -8)
If x-y=2 then x=2+y
And if you insert that in the first equation
Or
The first one is bigger so the answer is
What do you need to finish