Which is a function?, One house number used for multiple houses, Each house has a unique house number, One house has two house numbers simultaneously, House numbers are reassigned daily, Which mapping is a function?, Each hour has one temperature reading, One hour has multiple temperature readings simultaneously, Temperature readings change hourly, Multiple hours share the same temperature reading, Which mapping is a function?, Each voter ID is unique to one person, One voter ID is shared by multiple voters, A person has multiple voter IDs, Voter IDs are reassigned annually, Which situation is a function?, One car registration number used for multiple vehicles., Each car has a unique registration number., A car has two registration numbers simultaneously., Registration numbers are reassigned weekly., Which mapping is a function?, 1→2, 1→3, 2→4, 1→5, 2→5, 3→5, 2→4, 2→6, 3→7, 0→1, 0→2, 1→3

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