4. Data are collected on the amount of fat (in grams) and calories in the fronch
fry orders at nine fast food restaurants. The least-squares regression line for the
data is ý = 274.34 + 9.552, where y is the predicted number of calories and z
is grams of fat. Which of the following is the correct interpretation of the slope
of the least-squares regression line?
(A) The calories increase by 9.55, on average,
(B) For every increase in fat, the calories increase as well
(C) Every increase of 1 gram of fat causes an increase of 9.55 calories,
(D) For every increase of 1 gram of fat, the predicted calories increase by 9.55,
f) For every increase of 1 calorie, the predicted grams of fat increase by 9.55.