Leanbody mass(body weight leaving out fat)helps predict metabolic rate(howmany calories of energy you burn in an hour).The relationship is roughly astraightline.Theleast squares regressionline for predicting metabolic rate(y in calories)from lean body mass(xin kilograms)isy=113.2+26.9x.Data for the study ranged from 50kg to 120kg.The value of the coefficientof determination is (r²) is 80%.

Interpret the value ofr².