The given line graph illustrates information about students who visited three academic websites over a period between 2012 and 2017. Overall, the data highlight notable dissimilarities and developments across the categories presented.
Broadly speaking, it is evident that khanacademy.org and coursera.org experienced the greatest change, while udacity.com remained comparatively stable. Another noticeable pattern is that khanacademy.org saw steady growth throughout the period.
At the beginning of the period, the figure for khanacademy.org was around 0. This number then rose gradually to approximately 250 million. Regarding coursera.org, it started at 0 and surged to 250 million in 2015, reaching its peak. Suddenly, this measure went down gradually to 230 in 2017. These early trends indicate that the values moved in different directions. However, both of them were still the most visited.
The statistic of udacity.com escalated moderately from 0 in 2012 to 50 million in 2017, which means that this site was the least popular among lesson-takers. By the end of the timeframe, the levels of all metrics had stabilized at around 250 million, 200 million, and 50 million.
