easy middle school problem

Which statement accurately explains whether a reflection over the x-axis and a 180° rotation would map figure acb onto itself?

The graph shows the distance y, in inches, a pendulum moves to the right (positive displacement) and to the left (negative displacement), for a given number of seconds x. how many seconds are required for the pendulum to move from its resting position and return? enter your answer in the box.

What is a possible solutions of the x> 3?