This is due tomorrow the change in temperature from 8am to 8pm is 4 degrees. the temperature at 8pm was -5 degrees. what is the temperature at 8am?

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.