we can look at the equation above as some system of equations with two variables, and one equation is say y = -5x + 20 and another is y = Kx-2.
Now, the question will boil down to, what makes that system of equations have no solutions?
Well, usually in a system of equations we can see the no solution part, usually means both lines are parallel or they simply just don't intersect, we can see it with a simplification that makes no sense, like 25 = 17, or 0 = 5.
Now, how can we make that system above make no sense? hmmm how about if just make the "x" cancel out?
