Posted by Katie A on Thursday, September 29, 2011 at 9:51pm.
Are these lines parallel, or perpendicular
2x+4y=4
4x2y=1
I think they are niether

algebra  Reiny, Thursday, September 29, 2011 at 10:16pm
slope of first = 1/2
slope of second = 2
Do you want to reevaluate your decision ? 
algebra  Katie A, Thursday, September 29, 2011 at 10:28pm
so are the perpendicular?

algebra  Reiny, Thursday, September 29, 2011 at 11:19pm
yes, the slopes are negative reciprocals of each other