The line graph illustrates the proportion of the teenagers used to contact each other in a state from the United States from November 2006 to September 2009.
Overall, communication through phone call was at peak in 2006 which was surpassed by text messages at the end of 2009, in contrast, percentage of phone call remained static over the time. Additionally, email as a mode of communication is least among the categories, while the face to face conversation shows fluctuations thorughout the time.
In November 2006 , proportion of phone calls was almost 35% reaching at 40% till September 2009. On the other hand, text messages was just below 30%, which increased slowly till Feb 2008 and since then it has been elevated significantly at the peak of aorund 55%. Face to face talk at exactly 30% in Nov 2006 shows some fluctuation till Feb 2008, since then continued to be stable till Sep 2009.
Besides, other mode of communication, email was less popular for the whole period of time, starting at 15% in 2006 declining to 10% in 2009.