Which of the following functions is graphed below (Ive attached a photo PLS ANSWER ASAP!!!!!!!)

Answer:
C. y = [x] + 4 is your answer.
Step-by-step explanation:
What you do is you look at the y-axis and see how it goes up to positive 4.
This means it is a positive 4.
C. y = [x] + 4 is your answer.