Multiple Choice Question (MCQ)

If {(3,2),(4,2),(3,1),(7,1),(2,3)} is to be a function, which one of the following must be removed from the set?

  1. (3,2)

  2. ×


  3. ×


  4. ×


  5. ×

    none of the above

Collected in the board: Function

Steven Zheng posted 1 year ago


  1. In a function, there can’t be two pairs with the same input. Therefore, either (3,2) or (3,1), which is not among the set of answer choices, must be removed so that input 3 will be paired with only one number.

Steven Zheng posted 1 year ago

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