The transformation $\text E\,\vec{x}$ is defined by the following matrix. $\text E = \left[\begin{array}{rr}1 & -1 \\ 1 & 2\end{array}\right]$ **Plot the result of $\text E\,\vec{v}$ for $\vec{v}=\left[\begin{array}{r}3 \\ 4\end{array}\right]$.** [[☃ interactive-graph 1]]