For my group’s video, we had someone walk down the staircase of the school. Our graph’s y-axis,was elevation in meters and the x-axis was time. We estimated that the height of the staircase was about 5 meters so that is what we put as the starting elevation, eventually ending up at 0 meters. (at the bottom.) The graph also contained a flat section near the middle as that is where the stairs turned around to go down in the other direction. Finally, the line became steeper near the end as the people started to go down faster.

img_0784  (Video)