Can you predict the number of situps a person who watches 7 hours of TV can do (to one decimal place)

Question

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=-1.189

b=21.557

r2=0.370881

r=-0.609

Can you predict the number of situps a person who watches 7 hours of TV can do (to one decimal place)

Answer 1

linear regression just uses the y = mx +b equation from middle school.

So assuming x is the hours of TV, the predicted amount of situps will be a*7+b = -1.189*7+21.557 . Don't forget to round your answer to one decimal place.