(1 point) For each problem, select the best response. a) Measurements on young children in Mumbai, India, found this least-squares line for predicting height y from armspan x: 9 = 6.4 + 0.93;; All measurements are in centimeters (cm). How much on the average does height increase for each additional centimeter of armspan? 0A. 6.4 cm 0 B. 0.93 cm 0 C. 0.64 cm 0 D. 7.33 cm 0 E. None of the above. b) Smokers don't live as long (on the average) as nonsmokers, and heavy smokers don't live as long as light smokers. You regress the age at death of a group of male smokers on the number of packs per day they smoked. The slope of your regression line OA. must be between -1 and 1. O B. will be less than zero. 00. will be greater than zero. 0 D. can't tell without seeing the data. c) The points on a scatterplot lie close to the line whose equation is y = 4x 5. The slope of the line is OA. 4 O B. -4 O C. 9 O D. 5 O E. None of the above