The area under the graph can be calculated by: using geometry (if the lines of the graph are straight) counting the squares beneath the line (particularly if the lines of the graph are curved) ...

Physics and Python stuff. Most of the videos here are either adapted from class lectures or solving physics problems. I really like to use numerical calculations without all the fancy programming ...

A horizontal line on a displacement-time graph shows that the object is stationary (not moving because the displacement does not change) A sloping line on a displacement-time graph shows that the ...