Help please?

You're looking at a line graph. It shows the average price of a concert ticket
since 2000. Here are some of the points on the line: (2000, $40), (2001, $47),
(2002, $51). Based on this trend, which of the following would you expect to
see on this line graph?
A. (2005, $40)
B. (2003, $50)
C. (2006, $60)
D. (2004, $47)