Which of the following functions is graphed below?

Answer:
C. [tex]y = [x] - 4[/tex]
Step-by-step explanation:
When you plug in the value, it is always subtracted by 4.
Also, a subtraction separate from the x moves the graph down that many units. You can see the x-intercept (and the whole graph in general) has been moved down 4 units from the parent function.