In the following relationship, the ordered pairs are {(-4.8), (2,11), (-4,13), and (5,13)}. Is this relation a function​

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.

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angle measure.

Which expression is equivalent to sq-80