Student A and student B were given the following graph and asked to find the value of f(x) when x = 1. Student A gave an answer of 0 while student B gave an answer of −2 Who is incorrect?

Can someone be awesome and me with : (

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 is the slope of the line shown below?