Algebra-1

Question Analysis
This question assesses the understanding of the definition of a function, specifically the requirement that each input must have a unique output.

Key Concept Explanation
A function is defined such that each input (independent variable) has exactly one output (dependent variable). If an input corresponds to more than one output, the relationship is not a function.

Step-by-step Solution
1. Identify the input and output values in the given set of points: , , and

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