Which matrix transformation maps the unit square to a region with area k2k^2k2?
(k00k)\begin{pmatrix} k & 0 \\ 0 & k \end{pmatrix}(k00k)
(k001)\begin{pmatrix} k & 0 \\ 0 & 1 \end{pmatrix}(k001)
(1k01)\begin{pmatrix} 1 & k \\ 0 & 1 \end{pmatrix}(10k1)
All of the above