The line graph reveals the figure for average monthly contract of four cellular companies in a European country from January to September in 2012.
Looking from an overall perspective, it is readily apparent that the rates of monthly cost of four cellular companies of all sectors saw an upward trend, except for Sim TX over the period shown. In addition, the most significant change was seen in the number of Alpha.
In January, the figure for Domo was highest, recording 15 euros, followed by 13 euros of Lex. Furthermore, the earnings of the Sim TX were slightly higher than Alpha, with over 10 euros and 5 euros, respectively.
Over the next nine months, the number of Domo climbed rapidly with over 24 euros. Moreover, there was a steady climb in the level of Lex to 18 euros in September. Additionally, the monthly costs of Sim TX and Alpha sharply fell in January, at 9 euros and 5 euros, respectively. While the cost of Alpha shot up over 15 euros in June, the cost of Sim TX soared to 7 euros in April but it plummeted to 5 euros in June. Then, payments for Sim TX were lower, whereas those for Alpha were higher, at 8 euros and 25 euros in September.
