Compute the projection of b=⟨1,3⟩\mathbf{b} = \langle 1, 3 \rangleb=⟨1,3⟩ onto a=⟨2,−1⟩\mathbf{a} = \langle 2, -1 \ranglea=⟨2,−1⟩.
⟨−2,1⟩\langle -2, 1 \rangle⟨−2,1⟩
⟨−25,15⟩\langle \frac{-2}{5}, \frac{1}{5} \rangle⟨5−2,51⟩
⟨2,−1⟩\langle 2, -1 \rangle⟨2,−1⟩
⟨25,−15⟩\langle \frac{2}{5}, \frac{-1}{5} \rangle⟨52,5−1⟩