The line graph below shows US consumers' average annual expenditures on cell phone and residential phone services between 2001 and 2010.

The picture depicts data about the average spending each year on residential phone services and cell phones of the North American consumers between 2001 and 2010.

Overall

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, it is clear from the chart that mobile service expenses are growing exponentially.

On the other hand

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, we can observe that residential call services are experiencing the opposite. The average money spent on cell lines in 2001 was no more than $200. To compare, in 2010, the same information shows that it had risen to approximately $760.

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demonstrates a clear evolution in the way United States citizens have changed their use of mobile telephones nowadays.

In contrast

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, the residential phone services have experienced the other way around. In 2001, the cost per North American user was nearly $700.

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number went down to almost $400 in 2010 , which verifies a clear and huge difference of $300 in annual expenditures from 2001.