Matrix Formulation of the Multiple Regression Model: If x =

If x = (begin{pmatrix} 1 & 0 & 1 \ 2 & -1 & 0 \ -1 & 0 & 1end{pmatrix}) and y = (begin{pmatrix} -1 & 1 & 2 \ 0 & -1 & -1 \ 2 & 0 & 1end{pmatrix})
find 2x – y

Correct Answer: Option B

Explanation

2(10 – (-1) = 3 2(2) – (0) = 4 2(-1) – (2) = -4
2(0) – (1) = -1 2(-1) – (-1) = -1 2(0) – (-1) = 1
2(10 – (20) = 0 2(0) – (-1) = 1 2(1) – (1) = 1
(begin{pmatrix} 3 & -1 & 0 \ 4 & -1 & 1 \ -4 & 1 & 1end{pmatrix})