Band 9: The chart below shows the average cost of monthly contract for four different mobile (cell phones) in a European country from January to September 2002, measured in euro.

The given line graph compares the average monthly expenditures of contracts for four distinct cell phones in a European country between January and September in 2002.

Overall, all brands underwent ascending trends albeit with different degrees in monthly contract expenditures, except for Sim TX, whose trend was downward since June. Notably, while Domo’s figure topped the chart and Alpha’s ranked last initially, Alpha overtook Domo to take the top position, whereas Sim TX ended up at the bottom of the chart in the concluding month.

From January to Jun, the relative ranks of prices among phone brands were generally stable, except that Lex and Sim TX switched positions with each other in Jun. In detail, January saw the average price of a monthly Domo contract leading at 15 pounds, followed closely by Lex at 13 pounds, while the prices of Sim TX and Alpha were substantially lower at only 9 pounds and 5 pounds, respectively. By June, the average price of Domo had increased moderately to 20 pounds, which was four times that of Alpha, whose price peaked in April before reversing to its original figure of 5 pounds. Lastly, despite both having ascending trends, Lex consistently received higher average prices compared to Sim TX with the exception of June when the latter peaked at 15 pounds, minimally surpassing Lex.

In the remaining months, Alpha overtook Domo by a narrow margin in terms of average price, Lex continued its price rise, and Sim TX underwent a moderate decline in expenditure. Specifically, Domo reached a peak of 25 pounds in July before reversing back to roughly 23 pounds in September, losing its lead to Alpha after this brand’s price increased fivefold from 5 pounds in June to 25 pounds in September, becoming the phone with the highest average price monthly contract. On the other hand, Lex continued to climb to 18 pounds, being the 3rd highest phone in September. Sim TX saw a stark contrast when its average expenditure diminished to approximately 8 pounds, holding the bottom position among brands in the final month.