Question: For some reason the quality of production decreases as the year progresses at a light bulb manufacturing plant. The given data represent the percentage of defective light bulbs produced at a light bulb manufacturing plant in the corresponding month of the year.
Month (x) 2 3 5 7 8 9 12
% Defective (y) 1.3 1.6 2.0 2.4 2.6 2.8 3.1
Apply the equation of the least squares line to predict the % of defective bulbs in June.
[A] 2.15%
[B] 2.20%
[C] 2.3%
[D] 2.0%