The line graph displays how much was the average cost of monthly payment in four different mobile in a European country over a nine-month period from January to September in 2002 measured in euro.
Overall, it is clear that while Domo most of the period maintained the top position, Sim TX was the leader in the end of the period. Although, generally prices in all companies increased, except that of Alpha.
In January 2002, Domo provided the highest prices of monthly contract 15 euros, in May that of was 20 euros. Having reached a peak at 25 euros per month, prices in the Domo decreased. Prices in Sim TX experienced a fluctuation between 5 and 7 euros. Despite a fluctuation, cost started to increase and in September was in the highest position at 25 euros.
If we look at the details, cost changes in Lex and Alpha followed to the almost the same pattern until a May. While in May cost in the Lex was 13 euros that of in the Alpha was 9 euros. However, price in the Lex went up and was 17 euros , whereas it in the Alpha decreased and by the end of the period was 9 euros.
