The daily deseasonalised prices for a petrol outlet for a week (in cents/litre) are given in thefollowing table (where Sunday is day 1, Monday is day 2, etc). The equation of the least squares regression line that could enable us to predict thedeseasonalised price is closest to:单项选择题

题目图片
A

a. deseasonalised price = 84.3 − 1.25 × day

B

b. deseasonalised price = 84.3 + 1.25 × day

C

c. deseasonalised price = 0.601 − 49.7 × day

D

d. deseasonalised price = 1.25 + 84.3 × day

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