Help me simplify this expression.

Simplify a7/a4 a) 1/a3 b)-a/a2 c)a4/a3 d)a3

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.

Given the graphed function below which of the following orders pairs are found on the inverse function