In a simple linear regression model Y = b0 + b1X fitted by least squares, which statement is always true for the estimated regression line?

It always passes through the point (x̄, ȳ)

For n paired observations in simple linear regression, the least squares estimate of slope is

b1 = Σ(xi - x̄)(yi - ȳ) / Σ(xi - x̄)^2

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