Question

what is the equation to determine if two lines are parallel on a graph. Thanks.

Answer 1

if their slopes are equal.

Answer 2

so if you put them both into slope intercept form (y = mx + b) and their values for m are the same, they are parallel.

Answer 3

The determinant is zero. (linear algebra - http://en.wikipedia.org/wiki/Linear_independence)

Answer 4

the site you gave me doesnt work.