The line graph underneath provides data on the number of complaints received by the complaints department including in person, by email/fax and by telephone to an Airline over the period of six months in 2009.
Overall, it can be clearly seen that the number of complaints including in person and by email/fax exhibited an upward trend during the period. In contrast, the most uncommon complaint was sent to the complaints department by email/fax throughout the period.
Observing the line graph, the most popular complaint, which was send to the complaints department, was in person. It was a significant climb from over 400 complaints in January to approximately 1900 in July. It increased rapidly and surpassed the number of complaints including by telephone and by email/fax.
On the other hand, the complaints department received the lowest complaints by email/fax. It fell steadily from just under 800 complaints in January to just under 400 complaints in July.