straightning poly curve
 

Is there some way to let Maya make a perfectly straight line with the vertices you select? Check pic to see what I mean.

Hmm... not that I know of. If you're using a bevel command, you can lower the curvature to 0.

Or just delete the extra edges/vertices making the curve... an edge between two vertices is always a straight line...

hm... yes, I actually think I could delete those, don't think I need them... lemme try that now

yes, worked great. It was just too easy to come to think of