The line chart illustrates the mean cost of a monthly contract of four cellular companies in a European country from January to September 2012.
Overall, it is immediately noticeable that all of four figure for average cost were fluctuated. Moreover, Domo was the highest amount in amost all of the period.
In January, the mean monthly contract amount of Domo was 15 euros, which was 3, 8, and 5 euros higher than that of Lex, Sim TX, and Alpha, respectively. By May 2012, the figure for the monthly contract of Domo had fluctuated and stood at 20 euros. Similarly, the data for Lex and Sim TX had fluctuated and stood at 15 and 12 euros, while Alpha had fluctuated and decreased to 7 euros.
The figure for that in Domo still reamained in 20 euros in Jun and increased to 25 in July before dropping to 22 in the September. Alpha witnessed a significant increase to 25 euros in September, which was the highest amount in the end of the period. In constract, the Lex and Sim TX experienced the fluctuated and stood at 19 and 7 euros in September
