Final answer:
The function that describes Arthur's graph is y = f(-x).
Step-by-step explanation:
The correct option that describes Arthur's graph is y = f(-x).
If Jake's graph is described by the function y = f(x), Arthur's graph can be obtained by reflecting Jake's graph over the y-axis. To do this, we replace x with -x in the function. So, the function that describes Arthur's graph is y = f(-x).