The following scatter plot along with the least- squares regression line shows a linear association between a person's study time and result on a specific test. (A) Which data point (x , y) in the scatter plot above would have the greatest effect on correlation coefficient (regression line) when point is removed? Answer 1 Question 4 (55, 70) (B) Which data point (x , y) in the scatter plot above would have the least effect on correlation coefficient (regression line) when point is removed? Answer 2 Question 4 (60, 68) (C) Suppose the points (30,52) and (50, 67) are on the regression line. What is the rate of change of regression line? (two decimal places) Answer 3 Question 4 0.75 (D) How many points would the regression line predict the test score increase by if study time increased by 4 hours. Answer 4 Question 4 3