Cardiorespiratory fitness is widely recognized as a major component of overall physical well-being. Direct measurement of maximal oxygen uptake (VO2max) is the single best measure of such fitness, but direct measurement is time-consuming and expensive. It is therefore desirable to have a prediction equation for VO2max in terms of easily obtained quantities. A sample is taken and variables measured are age (years), time necessary to walk 1 mile (mins), and heart rate at the end of the walk (bpm] in addition to the VO2 max uptake. The following output is from a multiple regression. Interpret the slope of the time variable. Predictor Stday t-ratio P Constant 16.099 24.601 0.250 0. 237 1.08 0_3039 HR. -0.193 0 . 292 -O. TO 0.4809 -2. 806 0 . 628 -4.14 O.001637 1 07.217 R-84 - 63.524 R-84141j) = 59.944 Analysis of Variance SOURCE DF HE Regression. 1247 . 11 415-T T. P! 0 . 004189 Error 172. Total 14 1820 . 01 ( 1) We do not have enough information to say. 2) When time increases by 1 minute, VO2 decreases by 2.606 L/min, holding all other variables constant. 3) When time decreases by 1 minute, VO2 decreases by 2.606 L/min, holding all other variables constant. (4) When time decreases by 2.606 minutes, VO2 increases by 1 L/min, holding all other variables constant. 5) When time increases by 1 minute, VO2 increases by 2.606 L/min, holding all other variables constant