Map or recover points and finite coordinate sets
Apply the stated plane map to the labelled data
The coordinate map is
\[x' = x,\quad y' = 3y\]
\[p' = M p,\quad M = \begin{bmatrix} 1 & 0 \\ 0 & 3 \end{bmatrix}\]
Find the coordinates of each image point. The pre-image point \(Q\) is \((-1,\,-2)\)
Record the image point \(Q'\)