Algebra-1

Question Analysis
This question involves classifying an equation as a function based on its input-output behavior.
The main focus is on applying the "unique output per input" rule to a quadratic equation.

Key Concept Explanation
A function is a special type of relationship where each input (independent variable) has a unique output (dependent variable).

Step-by-step Solution
Analyze the equation: For every x, substituting into 

Click "Show Answer" to reveal the answer and analysis