Displacement is simply the change in position, or the difference in the final and initial positions:
[tex]\Delta d = d_f - d_i[/tex]
Then
(a) ∆d = 5 m - 0 m = 5 m
(b) ∆d = 1 m - (-2 m) = 1 m + 2 m = 3 m
(c) ∆d = 2 m - (-2 m) = 2 m + 2 m = 4 m
(d) ∆d = 6 m - 2 m = 4 m
