For the variables X and Y, we collect 4 observations with $$\sum_{}^{}X = 10, \sum_{}^{}Y = 14, \sum_{}^{}X^{2} = 30, \sum_{}^{}Y^{2} = 54, \sum_{}^{}XY = 31$$ The regression line y on x is

A

y = 0.8x - 5.5

B

y = 0.8x + 5.5

C

y = -0.8x - 5.5

D

y = -0.8x + 5.5