Displacement is a vector quantity, it is the difference between final and initial position of a particle.
Since particle initial position is 16.6 m and final position is 3.22 m.
Therefore,
[tex]Displacement = final\ position -initial\ position=3.22 m-16.6 m\\\\=-13.38\ m[/tex].
Thus, the displacement of the particle is 13.38 m in negative x- direction.
