The given line graph illustrates how teen communication patterns changed in the United States between November 2006 and September 2009.
Overall, the graph shows that text messaging saw the most significant rise to become the most widespread mode of communication for teens, while other communication channels remained largely stable or fluctuated slightly.
Regarding text messaging, there was a dramatic increase in the use of text messaging as a means of communication among teenagers, from just under 30% in November 2006 to almost 40% in February 2008. This was followed by a surge, making it the preferred method for over half of US teenagers in September 2009. In contrast, email remained a stable means of communication throughout the period, with only around 15% of teenagers using it in November 2006 and 10% at the end of the period.
On the other hand, there was a steady increase in the percentage of teens using cell phones to make calls, rising from 34% in 2006 to 40% in 2009. Furthermore, the percentage of teenagers who communicated face-to-face experienced a slight fluctuation throughout the period. It saw an increase from 31% in November 2006 to 40% in November 2007, declining sharply to 30% in February 2008, and then rising again to 34% in September 2009.