The line graph displays the comparison between stock values of four technology companies from 2011 to 2016.
Overall, two of them were increased in price (Facebook and Apple), Yahoo plummeted, and Google maintained at the same state. While Apple had dramatic fluctuations through the period, others were evolving relatively slightly or did not change at all.
Apple and Facebook had a price growth. Apple proliferated during the period between 2011 and 2012, and reached its peak at almost 35 000 before decreasing at the same pace the following year. After 2013, only relatively steady changes occured resulting in Apple being slighly above 5000. Less drastic fluctuations can be seen in stock price of Facebook since it only increased, without drops, from nearly 8000 to 20000.
Yahoo went down for years while google stayed steady. Despite maintaining the same during a 1-year period from 2014 to 2015, Yahoo had a stable decrease from about 8000 just as Facebook to about 2000 in 2011 an 2016 resoectively. Google did not go through any evolvements at all.