Question: Problems 17 and 18 refer to the system of normal equations and the formulas for a and b given on page 836. If are the

Problems 17 and 18 refer to the system of normal equations and the formulas for a and b given on page 836.
If

Problems 17 and 18 refer to the system of normal

are the averages of the x and y coordinates, respectively, show that the point (,)satisfies the equation of the least squares line, y = ax + b.

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