Two lines intersect each other at one point or they are parallel.[br][br]Take a look at the following graph.
You can use the sliders for variables [math]a[/math], [math]b[/math] , [math]c[/math] and [math]d[/math] to observe the nature of lines and their intersections.
1. When [math]a=-2[/math], [math]b=0[/math], [math]d=0[/math] and [math]c=2[/math], what are the equations of the given lines?
2. When [math]a=-2[/math], [math]b=0[/math], [math]d=0[/math] and [math]c=2[/math], at which point does both lines intersect?