Can someone explain how to find the measurement from parallel lines step by step please

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.

Graph the equation by plotting point x=2

X-intercept=-5 y-intercept=2 the equation of the line is