E6K-a+single+line+graph-vivian

The single line graph indicates total sales at student trip in 2007. The overall trend increases regularly. The sales line goes through three humps. The initial hump appeared from mid-January to mid-May, with a peak at 35,000 dollars, while the middle hump coming from the late May to the early August, peaking at 50,000 dollars. What is more, the last hump happened between mid-August and mid-December, with a top of 75,000 dollars. And in the remaining period, the sales line was stable in 30,000 dollars. The main reason for the fluctuation of sales number is university holidays. The sales tops appeared about 15 days earlier than university holiday, because hot tickets must be booked in advance. For example, the first peak was near Easter break and the second was near mid-semester break. In addition, the sales number was relate to how long the university break takes. For illustration, the summer break having longest holiday, about 3 months, created the highest sales record. Furthermore, the troughs showed in the initial school days may be because university students go to school and have lots of homework at that time.