Problem:
Find the least squares vector given the matrix
$\left(
\begin{array}{ccc}
 -1 & 0 & 3 \\
 -3 & -3 & 3 \\
 -3 & -2 & 0 \\
 2 & -1 & 1 \\
 1 & 2 & -1 \\
\end{array}
\right)$ and the vector
$\left(
\begin{array}{c}
 1.61 \\
 1.86 \\
 -2.99 \\
 -2.73 \\
 0.95 \\
\end{array}
\right)$.
Answer:
$\left(
\begin{array}{c}
 -0.533 \\
 1.254 \\
 0.796 \\
\end{array}
\right)$
{'source': 'AMPS', 'file': 'amps/mathematica/linear_algebra/least_squares/15644.txt'}