The graph below shows US consumers' average annual expenditures on the cell phone and residential phone services between 2001 and 2010. v.1

The given line graph depicts the data of average yearly spending of US consumers on the cell phone and residential phone services over a decade from 2001. A cursory glance at the graph is enough to show that the customer spending on residential phone decreased and on the mobile phone had increased. In the beginning year,   that was in 2001, the phone users spend massive $690 for residential phone services. Whereas, on mobile phone services they spent almost six-fold less than the land phone, that was 200$. Again, the very next year in 2002, the mobile customer spending pattern slightly went up to $300. Surprisingly, the residential phone users’ expenditure dropped to $650 in the same year. In the following years, the cell phone users spending skyrocketed and residential phone users spending dropped down and reached the same rate of $550 in 2006. Then, the land phone users spending pattern sank to $400 in 2010. However, the cell phone users spending hiked to almost two-fold than residential phone users, that was around $800 in the same period. Overall, the residential phone user declined tremendously and cell phone users increased in the USA during the period of from 2001 to 2010.