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=-0.719...

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=-0.719
b=37.806
r2=0.484416
r=-0.696

Use this to predict the number of situps a person who watches 11.5 hours of TV can do (to one decimal place)