I would go with D, it looks like it is the most linear out of the rest, Hope it helps:)
It’s B. (Note: The image below isn’t mine but I can assure you it is B)
Answer: 
Step-by-step explanation:
To find the inverse of the function
, the first step is to replace f(x) with "y":

The second step is to solve for the variable "x":

The third step is to interchange the variables, then:

Finally, let be h(x) the inverse of the function f(x). Then, you can replace "y" with h(x). Therefore, this is:

Part A:
Total boards = 3 sections of 4 boards = 12 boards
Alex paints: 1/6 of 12 boards = 2 boards
Bobby paints: 2 x Alex = 1/3 of 12 boards = 4 boards
Charles paints: 1 board
David paints: 12 - (Alex + Bobby + Charles) = 12 - 7 = 5 boards
-This means that David painted the largest part of the fence
Part B:
The fraction of the fence that David painted = 5 boards /12 total boards = 5/12
Try to get all your like terms to the same side. for example get all your x values to the left side and all your number values to the right side.
5 + 2x = 8x - 4
2x - 8x = - 4 - 5
-6x = -9
x = -9/-6
x = 1.5 or 1 1/2
hope this helps and have a great day! :)