A school is trying to determine if physical activity affects academic performance. The plot below shows the relationship between the amount of exercise a student gets per week, and the student's score on a math nal exam. The linear regression output is given below. g 100 . . v v E 0 Regression Statistics \"'5 75 . . . _ e. o . Multiple R 0.779146 I) . g 50 ' o _ . . 0 . ' R Square 0.607069 g , . .' Adjusted R Square 0.593035 X g 25 ' ' ' Standard Error 13.19323 \".3 WA g o 20 40 50 30 Amount of exercise per week (in minutes) R2 = Ex: 0.654321 The score on the math nal exam explains how much of the variance in amount of exercise per week? most I very little