A sleep specialist wants to know if meditating before bedtime can help people fall asleep. In a study, she asked the subjects to meditate for various lengths of time just before going to bed.
The specialist tracked the subjects' meditation times, x, and how long it took them to fall asleep, y. Both times were recorded in minutes.
The least squares regression line of this data set is:
y= –0.505x + 32.219
The least squares regression line predicts that an additional minute of meditation can reduce the time needed to fall asleep by______ minutes.