Replying to For anyone who shoots film...DlogE curve help!

Shot in the dark and chances are no one will have any idea what im talking about but... does anyone know anything about DlogE curves?  I just had to do a 12 page essay on a 5 different things for my remote sensing class.  The professor is letting everyone re-do one question, i know i messed up the D log E curve part and for some reason i cant get it, i know the basics but past that all i find is stuff that is way over my head.  Can someone dumb it down for me by any chance thanks