Find the projection of $\displaystyle \begin{pmatrix}-2\\2\\7\end{pmatrix}$ on the direction of the line $\displaystyle \mathbf{x}=\begin{pmatrix}1\\0\\2\end{pmatrix}+\la mbda\begin{pmatrix}-1\\1\\2\end{pmatrix}$

I'm used to finding the projection of a vector onto another vector. But this has confused me a little as it is the projection of the vector onto a line