Shelly found that the coefficient of determination between the age of a runner x and the runner’s finishing position y was about 0.728. What can she conclude?
72.8% of the variation in and the runner’s finishing position is explained by the runner’s age.
0.728% of the variation in and the runner’s finishing position is explained by the runner’s age.
53% of the variation in and the runner’s finishing position is explained by the runner’s age.
0.728 more variation in and the runner’s finishing position is caused by the runner’s age.

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