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Some people don't gain weight even when they overeat. Wouldn't that be nice? Perhaps fidgeting and other "nonexercise activity" (NEA) explains why - some people may spontaneously increase nonexercise activity when fed more. Researchers deliberately overfed 16 healthy young adults for 8 weeks. They measured fat gain (in kilograms) as the response variable and change in energy use (in calories) from activity other than deliberate exercise - fidgeting, daily living, and the like - as the explanatory variable. They found that r2 = 0.606. Which of the following gives a correct interpretation of this value in context? O a 60.6% of the fat gain values are accounted for by the least-squares line. 60.6% of the points lie on the least-squares regression line. 60.6% of the variation in fat gain is accounted for by the least-squares line. Od 60.6% of the variation in energy use is accounted for by the least-squares line. O 77.8% of the variation in fat gain is accounted for by the least-squares line