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The image depicts student numbers on educational websites from 2012–2017: coursera.org has 2 million in 2012, 40 million in 2013, 120 million in 2014, 250 million in 2015, and maintains at 250 million in 2016; khanacademy.org shows incremental growth from 2 million in 2012 to 30 million in 2013, then 90 million in 2014, followed further increase to 150 million in 2015, reaching 180 million in 2016 and 250 million in 2017; udacity.com starts at 2 million in 2012, moves to 10 million in 2013, then 20 million in 2014, 30 million in 2015, 40 million in 2016, peaking at 50 million in 2017.
Given the complexity of the image, the above description may not be entirely accurate.
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The line graph shows how figure for whom visited three educational websites from 2012 to 2017.
Overall, the number of students who surf in the khanacademy.org increeaed considerably, while figure for udacity.com website decreased with the former seeng a bigger change.
Focusing on the increase first, the number of students who visited khanacademy.org rose drammatically over the period. Starting from scratch in 2012, the number of students who visited knanacademy.org to almost about 249 in 2017, reachimg its peak. The figure for coursera.org also saw upward trend, which rose from scratch in 2012 to 250 million visitors in 2015 before the number of students decresed from 250 millions in 2015 to about 225 million in 2017.
In contrast, the figure for website udacity.com bucked the trend. Starting from zero in 2012, the numbers of visitors in udacity.com rose very slowly to 60 millions in 2017 with the lowest rate.
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