The line graph compares the average monthly subscription prices of four different mobile operators in a particular European country between January and September 2012. Prices are measured in euros.
Overall, the monthly costs of all the companies increased, albeit at varying rates, with the exception of SIMTX, which ended the period at the lowest price. In contrast, ALPHA had the most expensive monthly subscription for most of the given period.
Focusing on upward trends, the cost of DOMO stood at 15 euros in January, whereas it increased to 20 euros in March.Thereafter, it displayed cyclical fluctuations within a wide range and finished the period at 23 euros.The monthly price of LEX was 14 euros in January, while it slightly declined to around 11 euros in February. Following this, it showed alternating rises and falls and concluded the given period at 23 euros.When it comes to ALPHA, it started the period at 5 euros and remained at the same level in February, reaching a plateau. Subsequently, it oscillated moderately, reaching a peak of 25 euros between August and September and ending the period at that level.
Nevertheless, SIMTX bucked the trend. Starting at 8 euros in January, it exhibited considerable fluctuations. In June, it reached a maximum of 14 euros, and after a slight decline, it ended the period at 7 euros.