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26. A relation is a set of ordered pairs. 27. Afunction is a special kind of relation. 28. A consistent system with independent equations has a unique ordered pair as a solution. 29. One to one relations satisfy the definition of a function. 30. Many to one relations satisfy the definition of a function. 31. One to many relations satisfy the definition of a function. 32. The boundary line is solid when the points on the line are not part of the solution. 33. A system of inequalities has a unique ordered pair as a solution. 34. A system of inequalities has no solution. 35. It is possible for a system of inequalities to have no solution.​