Parallel, coincident and intersecting lines

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Parallel, coincident and intersecting lines

Two lines can be parallel lines, coincident lines or intersecting lines. Let's see the following graphs:


Parallel Lines are lines that never intersect. Two nonvertical lines are parallel if and only if they have the same slope.	Two lines that lie on top of one another are called coincident lines.	Lines that intersect in a point are called intersecting lines.

Determine if lines r:-x+9y+8=0 and s:x+y-8=0 are:

Parallel lines.
Coincident lines.
Intersecting lines. The point of intersection is: x= y=