Question

Hey, if anyone could help it would be appreciated :) I just can't simply understand Instantaneous Rate of Change when working with a sloped line. I have a question too: *The height, H meters, of a roller-coaster is given by H = -(1/80)D^3 + 3/8 D^2 where D is the horizontal distance from 0, in meters.* The roller coasters height is 20m, and it's length from 0 is 20m. If anyone cannot understand the diagram, please tell me and I will try to describe it better :D Thanks

Answer 1

or more presize

Answer 2

No, I will draw it