Please help me solve this problem one problem for 15 points

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 of the following answers is 7/9 simplified? 7/9 2/9 11/9 2/7

Give all possible names for the line shown. calculation tip: lines can be written with either point first.