Listed in the table below are systolic blood pressure measurements (in mm Hg) obtained from the same woman. Complete parts a through d. Right arm 108 105 100 85 84 Left arm 175 169 178 146 144 a. How well does the best-fit line actually fit the points in the scatterplot? Construct a scatterplot and draw the best-fit line. Choose the correct graph below. O A. O B. O C. D. 180- 180- 180- 180- Left arm 160 Left arm 160- Left arm 160 Left arm 160- 140- 140- 140- 140- 80 100 120 80 100 120 80 100 120 80 100 120 Right arm Right arm Right arm Right arm b. Briefly discuss the strength of the correlation. Compute r and r . Based on the value for r , identify how much of the variation in the variable can be accounted for by the best-fit line. r=(Round to two decimal places as needed.)