Algebra-1

Question Analysis
This question tests the understanding that a horizontal line has a zero slope. The equation represents a horizontal line, and the slope of such a line is always 0.

Key Concept Explanation
The key concept here is that a horizontal line has a constant y-value, meaning there is no change in the y-value as the x-value changes. This results in a slope of 0.

Step-by-step Solution
1. Identify the given equation: