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Math Help - Least-squares Solution z of the Overdetermined System

  1. #1
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    Least-squares Solution z of the Overdetermined System

    Find the Least-squares Solution z of the Overdetermined System
    |-3 1 | | 70 |
    | 1 1 | x = | 21 |
    |-7 1 | | 110 |
    | 5 1 | |-35 |

    Excuse my poorly typed notation as that is supposed to be a matrix times x = another matrix.
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  2. #2
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    If your 4x2 matrix is A, have you considered multiplying from the left with \left[\left(A^{T}\cdot A\right)^{-1}\cdot A^{T}\right]?
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