Compare each of the following graphs, then list a reason for each graph why it would not belong with the other three.

Graph A.	Graph B.
Graph C.	Graph D.

This table displays four mathematical graphs, featuring lines and inequalities plotted on a coordinate plane, for visual reference.

Compare your answer:

Your answers may vary,, but here are some samples.

• Graph A is the only set of graphs that represents a system of equations. It is the only system with exactly one solution.
• Graph B is the only set of graphs that represents a system of inequalities with no solutions.
• Graph C is the only set of graphs in which the boundaries are horizontal and vertical lines. It is the only one representing a system with an infinite number of solutions.
• Graph D is the only graph that does not represent a system. It only represents one inequality.