It is just two as you are dividing a negative by and negative turns into a positive
The expression you are looking for is:
0.2*w - 16
The ordered pairs are (1,-1) (1,-2) (2,-3) (2,-4).
This is not a function because in order to be a function, every x value needs to have one and only one y value. You can see here that the x values have two y values, so it is not a function.
I would go with C. Because we add the exponents together then we multiply the two fives.