Easing question

hey im a newb to easing, well, to flash really.

anyway i dont know how to ease ive got an animation a want to be slow at the start and quicker toward the end.
well thats not exactly what i want it do do bu if i can get to that stage i can figure the rest out.

how do i do htis, someone told me it was in the timeline, properties for tween…

im a bit confused, please enlighten me!