What is the easy trick to classify a system of equations (using the terms parallel, coincident, and intersecting) by only glancing at the two equations? I used to know but since it's summer I've forgotten how to easily tell them apart just by looking at them.

Question

lucaz · Answer

parallel equations have the same slope, like 3x+2 and 3x-7

anonymous · Answer

Shabbaranks, Lukaz, thank you both so much! You are life savers!

triciaal · Answer

coincidental  same line   usually one is a factor of the other