Question

How do you know when two lines are parallel?

Answer 1

@LynFran

Answer 2

two lines are parallel once they have the same gradient

Answer 3

ok cool

Answer 4

They should have the same slopes, which is m

Answer 5

Lines are parallel on a Riemannian manifold if you can find a connection between them, which is arbitrarily defined by the choice of connection coefficients or by the metric tensor of the space. :P

Answer 6

two lines are parallel when they don't intersect. It also indicates that there is no solution (an inconsistent system) when you're solving a system of equations by using the graphing method.