This screencast gives an overview of how to use Twixtor within Final Cut Pro, to do a speed ramp using two different methods. You will see an example of the Frame number and Speed option to do a speed ramp in Twixtor.

Timestamps:

00:25 SpeedRamp by Frame Number

04:14 Animation curve interpolation

04:56 Speed percentage method

**You can find additional and/or newer tutorials for Twixtor in Final Cut Pro here: https://help.revisionfx.com/album/28/