Answer:
5.5kg
Step-by-step explanation:
Given that in a study conducted to investigate the relationship between soda consumptions (servings per day) and weight gain (kgs) over a 2 year period and yielded the following linear regression results:
Let y = weight gains over a two year period (kg) and
x = servings of soda per day
Then the regression equation estimated is
[tex]4.5+0.25x =y[/tex]
Using this we can find unknown y for a given x.
When x =4 we get y by substituting x =4 in the equation
[tex]y (4) = 1+4.5 = 5.5[/tex]
Weight gain = 5.5 kg.