Using the function concept, a teacher's hobby cannot be represented as a function of the subject that teacher teaches, as teachers of the same subject can have different hobbies.
In this problem, the input is the teacher's subject, while the output is the hobby. As there can be teachers with the same subject but different hobbies, one value of the input would be mapped to multiple outputs, hence the situation cannot be represented by a function.
More can be learned about the function concept at https://brainly.com/question/12463448
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