Which is the set of whole numbers between ten and fifteen? {11, 12, 13, 14} all real numbers {12, 14} null set

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.