The line graph illustrates the average amount of money should a European resident pay for his mobile service during a month in four different mobile companies over a nine month period. Units are measured in euro.
Overall, the most striking feature of the data is that the monthly cost for contracts have been rose among all companies expect Sim Tx. Also, Alpha witnessed the most drastic increase.
In January, the cost for one month contract with Domo was the highest, with exactly 15 euros, followed by Lex and Sim Tx with approximately 12 and 9 euros, respectively. On the other hand, Alpha was the cheapest company with only 5 euros per month.
From January until March, the prices for one month contract experienced a slight increase among all groups. How ever, this trend shifted after this month and the figure for Domo experienced fluctuations finally, reaching to nearly 24 euros per month by September, while, Alpha saw a significant rise to a peak of 25 euros. While, the figure for Lex slightly increased to about 18 euros, the corresponding figure for Sim Tx decreased to 8 euros after reaching to its maximum value in Jun by nearly 14 euros per month.