The line graph displays the average cost of monthly contract for four various mobile phones in a European country from January to September in 2002.
Overall, four mobile phones consist of Domo, Lex, Sim TX as well as Alpha brands. In the beginning of the month, the payment for Domo phones started at the highest, while Alpha brand showed the cheapest cost compared to other brands. After nine months, Domo and Alpha brands displayed the highest payment, while Sim TX phones only decreased after an increase in June.
Looking at Domo and Lex brands, in January, the monthly payment started at 15 and 12 euros. Then, the cost of Domo phones fluctuated between 16-17 euros over three months, while payment for Lex phones remained between 13-14 euros from March to June after decreasing to ten euro in February. Domo phones reported an upward trend from April to June, from 20 to 25 euros and slowly decreased to 24 euro by the end of the month. Monthly contract for Lex phones showed an upward trend from June to September, costing 18 euro by the end of the month.
Moving on to the Sim TX and Alpha brands, in the first month, payment for both phones started at nine and five euros. After declining to eight euro in February, the monthly cost of Sim TX increased from March to June ( to 14 euro). From June to September, the figures showed a decrease in Sim TX, finally reaching to seven euro in the end. Although payment for Alpha phones fluctuated between 5-7 euros over six months, the monthly contract rose dramatically to 25 euro from June to September.
