The data depicts the average cost of the monthly contract of four cellular companies in a European country throughout the period between January and September in 2012. The amount of money is measured in euros.
Overall, the graph shows a steady upward trend. Almost all companies demonstrated a growth, except Sim TX, that levelled out at about 10 euros. According to the illustration, the cost of Lex and Sim TX were nearly the same as their lines intersected in June.
In details, the firms started at different prices in January: Alpha at 5 euros, Sim TX at about 10 euros, Lex at approximately 13, and Demo at 15. The corporation Alpha had a light rise and then dropped to its beginning level by June. Afterwards, the firm increased dramatically and reached its peak at 25 euros in September. The cost of Sim TX was rising and in June climbed at its highest point, crossing Lex at approximately 13€. However, it decreased by September and stayed the most low-cost just under 10€. Lex was the firm that fluctuated over the period had its lowest price (10€) in February and showed a steady growth, ending up at approximately 17 euros. Domo stayed the most expensive company during the period. The cost was unstable, even though in May and June the price was the same (20€). The firm Alpha was the one with the cheapest price and by September it became the most financially demanding.