The Manager of a Local Shopping Mall Uses Simple Linear

Multiple Choice

The manager of a local shopping mall uses simple linear regression to develop an equation that predicts the number of daily shoplifting incidents at the mall's stores based on the number of security guards employed.Below is a partial table showing the data that was used. The slope of the regression line is b = -1.2; the intercept of the regression line is a = 14.5.
Calculate the residual associated with the last observation in the data set, where x = 9 and y = 3.

A) -2.11
B) -0.7
C) 2.11
D) 0.7