The chart presents data about the typical monthly cost of mobile phone contracts covering four mobile phones in a European country from January to September 2002.
Overall, it is noticable that having the lowest price of Alpha phone in first six month, the figure increased sharply and ranked number-one by the end of the period.
To begin with Domo phone, the cost estimated to be the highest in first half of the year, and expirienced significant upward trend from a quarter to 25 euros from January to July. After that, the figure went down to just under 25 euros by the end of the year. By contrast, having the lowest price of Alpha phone with 5 euros in the first half of the year, went up substantially to 25 euros by September, which surpassed the Domo phone.
When it comes to Lex phone, the contract had a marginal flactuation with around 12 and justunder 15 in May, following this pattern, shot up greatly to 17 euros by September. The Sim TX phone, despite of growing slightly from 9 to 14 euros, the figure reduced considerably to 8.