Answer:
Not a function.
Step-by-step explanation:
A relation is any set of ordered pairs, which can be thought of as (input, output).
A function is a relation in which no two ordered pairs have the same first component and different second components. A function can only take on one output for each input. We cannot plug in a value and get out two values.
In your first component, the input 0 has two outputs: 6 and -2.
Therefore, the given relation is not a function.
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