The line graph illustrates the cost of contract in every month for 4 different types of cell phones in a European country from January to September in 2002.
Overall, there was an increase in the figures for all companies, except for Sim TX whose price remained unchanged over the period shown. In addition, the monthly cost of Alpha’s contract experienced the most remarkable growth.
Alpha originally witnessed a lowest price in the beginning of 2022 at 5 euros . This number remained stable in the next five months before surging to 25 euros in September, which made Alpha became the predominant monthly contract. There was a slight increase in the cost of the contract for Lex , from nearly 13 euros in January to 25 euros in September.
Domo had the highest price in January, with 15 euros. Then, the figure of contract for Domo rose dramatically and reached a peak at 25 euros before declining gradually to around 23 euros. The price for contract of Sim TX started at nearly 10 euros in January, then it climbed minimally to 14 euros in June and decreased to 8 euros in the remaining period.