e., there exists a scalar $k$ such that $\vec{v} = k\vec{w}$, or equivalently, $\frac{v_x}{w_x} = \frac{v_y}{w_y}$, provided $w_x \neq 0$ and $w_y \neq 0$.
Given vectors are:
$\vec{v} = 6a\vec{i} + 3\vec{j}$
$\vec{w} = a^2\vec{i} - 6\vec{j}$
For the vectors to be
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