The chart illustrate the average price (accounted in euro) of monthly contract for several mobile of cell phones (Domo, Lex, Sim TX, and Alpha) in a European country for over ten month, January to September 2002.
Overall, all of the mobile cell phones experienced an upward trend, while Sim TX had a decrease of number at the end of the month. The Alpha cell phone received a sharp grow in the last four months.
First, the Domo started at the highest number compared to other cell phones at 15 euro, then remained stable with little fluctuation until April to just above 15 euro. Both on the May and June, Domo had a slight increase to 20 euro respectively. Then peaked at a high of amount to 25 euro before dropped slowly to just under 25 euro in September. The Lex cell phones started at just above 10 euro, became the second highest number at the beginning of the month. Then received a little slump at februari to 10 euro. On the March until September had a fluctuation, while June had a slow dropped to just under 15 euro before slightly rose to approximately 18 euro in September 2002.
Next, the Sim TX received a fluctuation over the months, started at just below of 10 euro then had a minimal increased to approximately 14 euro in June, before dipped dramatically to around 8 euro in September. The Alpha cell phones remained stable on January until June at 5 euro, then had a dramatic surge number to 25 euro, became the highest final amount compared to others in 2002.