A Company Studying the Productivity of Its Employees on a New

A company studying the productivity of its employees on a new information system was interested in determining if the age (X) of data entry operators influenced the number of completed entries made per hour (Y) .The regression equation is
) Suppose the actual completed entries per hour for an operator who is 35 years old was 8.The residual is _______ .

A) -1.3
B) 2.6
C) -3.5
D) 1.3
E) -2.2