John swam 40 minutes what fraction of one hour is this

What aspects of lines have to be diffrent

How to determine whether two known pairs of points are on the same line.

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.