Q2.1. Prove the following property of Least-square fit: n n 1. e = (yi - gi)...

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Q2.1. Prove the following property of Least-square fit: n n 1. Σe = Σ(yi - gi) = 0. i=1 n n 2. Σy = Συ i=1 i=1 n Σxi, Y 3. The least square regression line passes through the point (x, y), x = ¹ ℃ N n Σyi. i=1 4. AT ;C; = 0. 5. Σ yie; = 0. i=1 = Q2.1. Prove the following property of Least-square fit: n n 1. Σe = Σ(yi - gi) = 0. i=1 n n 2. Σy = Συ i=1 i=1 n Σxi, Y 3. The least square regression line passes through the point (x, y), x = ¹ ℃ N n Σyi. i=1 4. AT ;C; = 0. 5. Σ yie; = 0. i=1 =