Determining Correlation In Exercises 19-24, plot the points and determine whether the data have positive, negative, or no linear correlation (see figures below). Then use a graphing utility to find the value of r and confirm your result. The number r is called the correlation coefficient. It is a measure of how well the model fits the data. Correlation coefficients vary between -1 and 1, and the closer |r| is to 1, the better the model.
(1,3), (2, 6), (3, 2), (4, 3), (5, 9), (6, 1)
Single Variable Calculus: Early Transcendentals, Volume I
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