Without motion, the universe would be frozen in an instant of time. Motion is ubiquitous, from the swarming of electrons within an atom to the gravitational dance of distant galaxies. Fundamentally, motion is about changes in position. We quantify motion by first defining position and then introducing velocity as the rate of change of position. Velocity, too, can change, and its rate of change defines acceleration. Graphs of position, velocity, and acceleration versus time show how the 3 fundamental concepts of motion are related.