how can i tell if my car has been lowered????

I have a 96 Camaro with 3.8 v6... i was wondering if my car has been lowered because i have problems with the back end bottoming out..... how can i tell if my car has been lowered??? Does anyone else have the same problems???

I scape on just about everything if i dont angle it.

A camaro botoming out is like a bassett hound walking over a speed bump, just like the bassett hound, you learn to avoid those spots.