Question

For each problem, select the best response. (a) The points on a scatterplot lie close to the line whose equation is y = 2x – 8. The slope of the line is O A. -2 o B. 10 o C. 8 D. 2 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 O A. will be less than zero. O B. will be greater than zero. O C. must be between - 1 and 1. O D. can't tell without seeing the data. (c) Fred keeps his savings in his mattress. He began with $700 from his mother and adds $200 each year. His total savings y after xd years are given by the equation A. y = 200 + 700x o B.y = 700 + 200x C. y = 200 + x D. y = 700 – 200x o E. None of the above.

Answer 1

a) slope = 2

Option-D) 2

b) Option-A) will be less than zero

c) y = 700 + 200 * x

Option-B) 700 + 200x