What is the period of oscillation in this graph?

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SUMMARY

The period of oscillation in the provided graph is determined by the time it takes for the wave to complete one full cycle. Users in the discussion suggest that the period is approximately 2 seconds, with recommendations to analyze multiple wave cycles for accuracy. A common method mentioned is to measure the time of several waves and divide by the number of waves to minimize error. The consensus is that the initial guess of 2.5 seconds is likely incorrect due to misreading the divisions on the graph.

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What is the period of oscillation in the screenshot?

http://img296.imageshack.us/img296/5296/image12yt4.gif

Period is just the time it takes to travel from one point on the graph to the exact same point again in the same direction. Looking at the graph I would guess somewhere around 2.5 seconds, but every answer I enter in the online submission says incorrect. This should be so simple but I can't figure out why all my answers are wrong?
 
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maybe you didn't read the divisions right... or try to look at the time of something like TEN waves, and divide that by ten... I'm guessing that your answer might have too much error to be considered correct.
 
Take an average over the whole wave. It's pretty clear the period is less than 2 seconds.
 

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