Use this to predict the number of situps a person who watches 12 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=-1.008

b=21.677

r2=0.715716

r=-0.846

Answer 1

Hi Brandon,

You were given y=ax + b, so let's break that down:

y=number of sit-ups you are looking for

a=slope

x=hours of TV watched

b=y-intercept

Now, getting to our specific values:

y=y, number of sit-ups

a=-1.008

x=12

b=21.677

Substituting:

y= -1.008(12) + 21.677

y= -12.096 + 21.677

y=9.6

I hope this helps.