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September 18, 2014

September 18, 2014

Posted by **jerson** on Monday, September 15, 2008 at 10:56pm.

- trig -
**David Q**, Tuesday, September 16, 2008 at 2:42pmThe correlation coefficient (r) is just the square root of rē ... but there are two square roots of rē, namely +r and -r. However, there's a clue: the line of best fit has a negative slope - so that tells you the sign of r.

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