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**1. The problem statement, all variables and given/known data**

Hi, in class we done the classic pendulum experiment to investigate the relationship between time period and the length of the string. Here are my averages for time period and the length:

Length (m)----Average time (T1+T2/2)

0.2 11.3

0.4 14.9

0.6 17.41

0.8 19.98

1 23.71

**3. The attempt at a solution**

Having drawn the graph of Time against Length and getting a strong postive correlation, I was expecting time squared to produce a curved graph. However, it is coming out as a stretched "s" shape, all be it a very faint one, so it isn't far off from being straight. Should this be the case? And also, do I need both graphs together to demonstrate Time being proportional to Length, or, will either one be sufficient?

Thanks

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