Does anyone know how to do zooms with like graphs?

Easing functions: HOW TO: Use Easing Functions :disco:

That link above is for overlays, but those will work on zooms as well.

For simple changes like the ones you described, easein and easeout are the ones you want. Add them to the end of your command for example:

@zoom on 349 383 to 300% in 3 using easein