​The slides in this lesson refer to walking in front of a motion detector.

​Walking away from a motion detector will produce a graph with a positive slope and walking toward the motion detector will produce a negative slope.

​Speed is determined by the slope of the graph.

​The graph indicates that the distance is not changing, so the individual is standing still.

​The graph indicates a positive slope, so the person is moving away from the detector. The straight line means the speed is constant.

​The negative slope indicates that the person is walking toward the detector at a constant speed.

​The slope of a distance time graph determines the speed that an object is moving.

​Slope is determined by taking the rise divided by the run. slope = rise/run

​The greater the slope, the greater the speed.

​B is moving faster because it has a steeper slope.

​A is father from zero on the y-axis and has a lead over B at the start.

​At the intersection, both A and B are at the same distance at the same time.

​A has a steeper slope than B, so it is moving faster.

​Both objects have a negative slope, therefore, they are moving toward the detector.

​Both objects are moving toward the detector. B starts out closer to zero.

​We have a straight line with positive slope. So the object is moving away from the detector and a constant speed.

​Distance is not changing, so it is standing still.

​B has the steeper slope, therefore, B has the faster speed.

​The runner in red starts 10 meters ahead of the blue runner.

​The graph indicates that the lines have the same slope, therefore, each runner has the same speed.

​The End!