9) \(\vec{b}\) = -\(\vec{j}\)

The vector \(\vec{b}\) is given as \(-\vec{j}\). This means the vector has a magnitude of 1 and points in the negative y-direction. On the provided coordinate plane, the negative y-axis is directed downwards. Therefore, the vector \(\vec{b}\) starts at the origin (0,0) and ends at the point (0, -1).