The line graph illustrates the average cost that American customers spend on mobile and residential phone service annually between 2001to 2010. Overall, it can be seen from line graph that, cell phone services spending on sharply increased while expenditures and residential phone services declined dramatically, both of services met on the same point in 2006 According to the line graph, In 2001, spending on mobile phone services began by $200 while the annual expenditures on the residential phone services were about $700 during the 5 years expenditure on residential phone dropped below $600 whereas, expenditure on cell phones rose over $500. In 2006, cell phones were overtaking residential phones and grew to $600 in 2007 then went steeply to $650 in 2008 thereafter, rose to approximately $750 in 2010. Meanwhile residential phones sow a graduall drop in 2007 and continued moderate decrease to 2010. Wordcound-152