Problem:
Find the least squares vector given the matrix
$\left(
\begin{array}{cc}
 2 & -1 \\
 -2 & -2 \\
 2 & -3 \\
 0 & 1 \\
 2 & -2 \\
\end{array}
\right)$ and the vector
$\left(
\begin{array}{c}
 1.21 \\
 -0.09 \\
 0.43 \\
 1.25 \\
 0.72 \\
\end{array}
\right)$.
Answer:
$\left(
\begin{array}{c}
 0.304 \\
 -0.004 \\
\end{array}
\right)$
{'source': 'AMPS', 'file': 'amps/mathematica/linear_algebra/least_squares/44539.txt'}