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Choose "function" or "not a function" for the problem. {(30,-9), (15,9), (–15, -9), (-30, 9)}​
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Choose "function" or "not a function" for the problem. {(30,-9), (15,9), (–15, -9), (-30, 9)}​

User Dash
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This is a function because every range value contains a unique domain value, meaning that no domain value leads to two different range values.
User Reddspark
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