Which graph shows acceleration?

A graph of position (meters) versus time (seconds) has a straight line running from 0 seconds 0 meters upward.

A graph of position (meters) versus time (seconds) has a concave line running from 0 seconds 0 meters upward.

A graph of position (meters) versus time (seconds) has a straight line running from 0 seconds positive number of meters downward to some later time 0 meters.

1 answer

The third graph shows acceleration, as the position is decreasing over time, indicating a negative acceleration.