The line graph illustrates average yearly spending on cell phone and residential phone service in a nine-year timeframe starting from 2001. Overall, it is clear that while the expense on cell phone service witnessed a considerable rise, the opposite was true for that of its counterparts.
The expenditure on cell phone service stood at $200 at the beginning of the period, $500 lower than that of residential phone service. This figure went up by $250 between 2001 and 2005 and continued climbing until it reached a high of $780 at the end of the period (the highest figure in the chart).
In contrast, the expense on residential phone service reached a high of $700 in 2001. This figure experienced a slow drop to approximately $580 between 2001 and 2005. Over the next five years, it declined to just nearly $400, half of the starting point.