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A relation in a teacher licensure study group pairs each student ID with the student's current math placement, but some students have two placements during a schedule-change week. Which conclusion follows?
It is still a function because every placement has at least one student.
It is not a function only if two students have the same placement.
It is not a function during that week if one input student ID is assigned to two different placements.
It becomes an inverse function because placements can be traced back to students.
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