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 Related Terms
 Point of Intersection:  The point at which two or more lines intersect (cross).
Solution: A number (or ordered pair of numbers, or set of numbers) that produces a true statement when substituted for the variable(s) in an equation or inequality.
System of Equations: Two or more equations that together define a relationship between variables usually in a problem situation. It can have no solution, one solution, or many solutions.
Intersecting Lines: Two lines that cross each other. Lines intersect at one point unless the lines fall directly on top of each other (in which case they are essentially the same line and are sometimes called coincidental).
Parallel Lines: Two lines are parallel if they lie in the same plane and they do not intersect.
Perpendicular Lines: Two lines are perpendicular if they intersect at a right angle.
Graph of a Linear Equation: The graph of all solutions of a linear equation, resulting in a straight line.