It’s not speed, it’s the height over time
yeah, it is not speed, it is unit over time, so, wait for it... speed.
The derivative of this is the speed
and its visual perception is distorted due to the truncated axis.
it should start at negative because there are periods where the speed is negative.
"where the speed is negative"? wait, what, i thought this is not speed - as per your first sentence. also, the axis should start at zero, because... at some point the height of the person was negative?
well thank you for your input 😂