The given line graph demonstrates the average cost of the monthly contract of different types of cellular companies in Europian country between January and September in 2012.
Overall, Domo company had the highest proportion of average cost, while Sin TX company had the lowest proportion.
At the beginning of the period, Domo company’s mobile phones was approximately 15 euros. Then in the end this figure fluctuated sharply and showed almost 23 euros. In contrast, Lex’s phones was about 13 euros in January, then it decreased minimally in the February. After, this figure increased minimally and remained stable for a 3 month. In the end of the period, Lex’s mobile phones was stood at 14 euros. From January to June, Sim TX’s phones was stayed stable, with a little changes. In June the figure went up significantly, and demonstrated 14 euros. In September, the average monthly cost of Sim TX’s phones was decreased and showed only 6 euros, respectively.
Comparing to them, Alpha company’s mobile phones increased minimally in January, February and March. However, during the period from April to June it decreased minimally and showed 4 euros. Then, this figure rise sharply and reached a peak, by showing 23 euros, respectively.