7 please again thank you

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. 3 b=33. 007 r2=0.442225 r=-0. 665 Use this to predict the number of situps a person who watches 14 hours of TV can do (to one decimal place)