Is there an online site that talks about Linear Relations thoroughly. Could you please post links to some. I tried going to mathisfun. c o m , because that is usually the only site which explains everything well and fits everything into my head; unfortunately, linear relations could not be found there.

You can either post me sites or do some brief notes about linear relations:

-I need help more on the extrapolate and interpolate stuff.

Thank you very much for all your help
:-)

Maybe try searching for "Linear functions"