The line graph illustrates data about the average yearly expenditures on cell phone and residential phone services by US consumers over a ten-year period from 2001 to 2010.
Overall, the usage of landline phone services decreased drastically over time. In contrast, the usage of mobile phones rose significantly, reaching a peak by the end of the decade.
As can be seen from the graph, the highest amount of money spent on landline phone services was around $700 in 2001. This was the peak usage of residential phone services, which then fell sharply year by year, reaching its lowest point of about $400 by the end of the decade.
Conversely, expenditures on mobile phone services increased at a constant rate, reaching the highest point by 2010. The spending on mobile phones was just around $200 in 2001 but increased sharply to a maximum of approximately $800 by the end of the decade.