The Vectors $\vec{u}=4 \vec{i}+5 \vec{j}-6 \vec{k}$ And $\vec{v}=-12 \vec{i}-15 \vec{j}+18 \vec{k}$ Are Parallel

The vectors $\vec{u}=4 \vec{i}+5 \vec{j}-6 \vec{k}$ and $\vec{v}=-12 \vec{i}-15 \vec{j}+18 \vec{k}$ are parallel.