Mechanics Question Help

Hi guys, when a particle is moving north-east for example, do you set the i and j components of the displacement vector to be equal or the i and j components of the velocity vector to be equal. In the book, it says displacement but in a youtube video, it was the velocity vector so I'm slightly confused. Thanks!

Moving in a north easterly direction would mean the velocity vector had equal i and j components. The position of the object could be anywhere, but the local movement (tangent to the position curve) would be ki+kj. Similarly you could say the object was located at a point north east of the origin. Then it would be the displacement vector.

Ok I see. So if it's 'moving' in a particular direction, it would be the velocity vector. However, if a question said, for example, the time at which the particle is directly north east of O, it would be the displacement vector? (got this from the book).