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.