When graphing a parabola, how are the points for the x and y-intercepts found?

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.

Which equation matches the graph shown ?

Anyone know? will mark brainliest if correct!