The line graph illustrates the average cost that American customers spent on mobile and home telephone services in 10 years.
Overall, users residential phone is decreased slightly meanwhile popularity of cell phone services increased dramatically and then both of them reach the same record at 2006.
In 2001, residential phone services began with 700$ and cellphone services is 200$ but in the following five-year period home telephone services dropped marginally to under 600$, whereas cellular phone still rose significantly over 500$.
In 2006, residential phone services and cellphone services together hit above 600$, in the next five years the average annual expenditures of cellphone services grew steadily and peak at 800$, meantime spending on residential phone services continues declined considerably to 400$ to the end of the period which is also means the average annual expenditures of cellphone services is twofold higher than the spending on residential phone services.
