David K. answered • 12/21/15
Tutor
New to Wyzant
I will help you find what you're stuck on, I am patient
The domain of a function is basically asking what values of x are even remotely possible to achieve.
In this case
f(x) = 2x - 100 + 200
f(x) = 2x +100
is just a line there is nothing that would make this graph impossible.
So the domain would be all values of x
