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=-1.336 b=25.984 r²-0.375769 r=-0.613 Use this to predict the number of situps a person who watches 13 hours of TV can do (to one decimal place)

Fig: 1