1.

Write the Normal equations for fitting the parabolic trend, y = a + bx + cx2.

Answer»

Normal equations are :

na + bΣx + cΣx2 = Σy.

aΣx + bΣx2 + cΣx3 = Σxy

aΣx2 + bΣx3 + cΣx4 = Σx2y



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