Hi mushroomgod - did this get solved for you now from the replies above?

Yeah - you'll need to use straight snap, which by itself handles the first tangent, then for the ending one as described above you'll need to set up a construction line (by holding down and dragging, also with straight snap still enabled) to set up a kind of snapping guide for placing the second-to-last point.

Let me know if this still isn't clear.

- Michael

@Pilou Entre mon anglais pourri et tes graphs de physicien je pense que le gars est entre de bonnes mains :P

:)

Between my physicist's graph and the PaQ abstract's drawing, Mushroomgod you will be lucky if you will find your solution! :)

In any case Helpers lines are always your friends!