Question

Describe how you would determine whether two lines are parallel by looking at the equations of the lines in standard form. << read less

Answer 1

See, please, this offered explanation:
Common equation of line is: y=kx+b, where parameter k - shows value of tangens...
If for line-1 equation is y₁=k₁x+b₁ and for line-2 is y₂=k₂x+b₂, they are parallel by condition k₁=k₂.

Answer 2

Parallel lines have the same gradient Whereas perpendicular lines do not

Explanation: