EMNM Q.10

10Four arbitrary points (x₁, y₁), (x_2, y₂), (x₃, y₃),(x₄, y₄) are given in the x, y-plane. Using the method of least squares, if regressing y upon x gives the fitted line y = ax + b; and regressing y upon x gives the fitted line y + ax + b; and regressing x upon y gives the fitted line
x = cy + d, then

Option : D
Explanation :

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