Algebra-1

Question Analysis
This question tests the understanding of the uniqueness requirement for functions. The key concept is that in a function, each input must correspond to exactly one output. If an input corresponds to multiple outputs, the relationship is not a function.

Key Concept Explanation
A function is defined by the property that each input (independent variable) has a unique 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 given points: