The line graph shows the number of protests experienced by the objections department of a single airline over a half-year period in 2009.
Overall, although the number of complaints in-person and by telephone increased over the period, while by email and fax consistently was the lowest number for 6 months. It is also clear that the number of protestations in-person were highest at the end of the period.
Turning to the details, the number of complaints by people increased slightly from 400 to 800 in 3 months, despite this, this line level continued to increase dramatically to about 1850 in June. There was a slightly decrease in complaints by phone, whereas after some period it increased steeply for 4 months.
On the other hand, the figure for objection by email and fax experienced a completely opposite trend. Its number decreased significantly approximately from 790 to 390 between given the period.
