Given the regression equation in 2 forms: (1) yi = B0 + B1xi + ui; (2) yi = xB + ui (where x and B in the 2nd equation are vectors). And both equations are the same. Does vector x = [1 x1] or [x1] (row vector)? Vector B = [B0; B1] (column vector)? Does
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- if given the equation yi = B0 + B1xi +ui and express the same equation as y = xiB = ui (where xi and B here are vectors), does vector xi = [1 x1] or xi = [x1] (row vector) and B vector (column vector) = [B0; B1]?How do you subtract two vectors algebraically? Geometrically?Express the vector -9-7x- 15x² as a linear combination of p₁ = 2 + x +4x², p₂ = 1- x + 3x² and p3 3 + 2x + 5x²