Speed Graph Issue

[MahaB82A]

I am following a tutorial. In this tutorial animation of a bouncing ball under gravitational force is shown. I do not think bouncing ball under gravitational force will have a shape of this type of speed graph. As I know related subject I am sure speed graph of a bouncing ball under gravitational force will be:

I wish to know whether it is possible to get this type of speed graph in Ae.

Tutorial video is attached here or you can download at this link

https://easyupload.io/jyg9ik

[Rick Gerard · Accepted solution]

If your uploaded movie is an example of a tutorial on making a bouncing ball, the tutorial is terrible. 

What tutorial are you following?  It takes some fiddling with a speed graph to get nearly straight acceleration and deceleration lines. You can get close. 

If you want a bouncing ball, the easiest thing to do is use an expression. Motionscript.com has Realistic Bounce and Overshoot. That might get you started.

[MahaB82A]

Thanks for the link. This is a Udemy tutorial.