They are using two different functions.
Tell your math teacher that questions like these are loaded and should not be given as assignments.
Domain: {-4,0,8}
Range: {1,5,10}
Answer:
C) 3(x + 3y + 5)
D) 3x + 3(3y +5)
Well, what I would do [not sure if it's the correct way], is use the white area as a sector of a circle. The top right of the box is the center of the circle, so the radius is 6.
Then, by the white portion being one quarter of the circle (90° out of 360°), I could calculate the that pink shaded region = the total square (6×6) minus the white sector.
So area (A) of white sector (s): A(s) = 1/4×pi×r^2

36 - 28.27 = 7.73
195.638
that's some weird logic but ok