The graph shows the possible combinations of the number of adult tickets sold and the number of student tickets sold. What does the vertical intercept (0,200) tell us in this situation? A. It tells us the decrease in the scale of adult tickets for each student ticket sold.
B. It tells us the decrease in the scale of student tickets for each adult ticket sold.
C. It tells us that if no adult tickets were sold, then 200 student tickets were sold.
D. It tells us that if no student tickets were sold, then 200 adult tickets were sold.