Question

A particle moving uniformly along the x axis is located at 11.3 m at 0.588s and at 3.38 m at 4.67s. Find the displacement during this time intervals.

Answer 1

The displacement is

     (position at the end of the time interval)
minus
     (position at the beginning of the time interval).

Displacement = (3.38m - 11.3m) =  -7.92 meters.

The time labels aren't needed to calculate displacement. 
They're only there to confuse us and to see whether we
really know what we're doing.