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= -1.009

b= 21.273

r^2= 0.717409

r= -0.847

Use this to predict the number of situps a person who watches 12.5 hours of TV can do (to one decimal place)

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