Algebra-1

Question Analysis
This question tests the student's ability to determine if a given algebraic relationship represents a function. The key concept is that a function must have a unique output for each input.

Key Concept Explanation
A function is a special type of relationship where each input (independent variable) has a unique output (dependent variable). The given relationship can be tested by substituting different values of and checking if each value gives a unique value.

Step-by-step Solution
1. Examine the given relationship: .
2. Substitute different values of and calculate the corresponding values.
3. For ,