The chart shows the avarage value of monthly contract for four different cell phones in a European country from January to September 2002.
Overall,all costs in the charge grather than 5 euro,aslo every costs are increase in different times. In the start of 2002 all costs are stability. Abundance of this numbers are identify in July and September 2002. The most productive and increase company is Alpha,from January to June its stable,but other hand graph are grown very quickly and exponential, its means that this is the most effective and important part of the situation. Meanwhile Slim TX and Lex company is not going growing up, on the contrary they are a bit similar before June. After that Slim TX are different way,dicrease and falling. In the other hand Lex company who are grown and shows more stability than others companies
In conclusion, the data shows a clear trend in Europe country,with perspective of developing.
