A regression was run to determine if there is a relationship between hours of TV watched per day (x) and number of situps a person can do (y). The results of the regression were: y=ax+b a=-0. 628 b=21. 149 -2=0.649636 r=-0. 806 Use this to predict the number of situps a person who watches 2 hours of TV can do (to one decimal place)