Choice A is the correct answer. Horizontal lines have the form $y = k$.

1. Identify: A horizontal line has a slope of 0 and passes through all points with the same y-coordinate.
2. Select: The y-coordinate of the point $(4, -2)$ is $-2$.
3. Equation: $y = -2$.

💡 Strategic Tip:Horizontal lines have 0 slope and are y= equations (HOY). Vertical lines have Undefined slope and are x= equations (VUX).

Choice B is incorrect because$x=4$ is a vertical line. Choice C is incorrect because it uses the x-coordinate for a y-equation. Choice D is incorrect because it uses the y-coordinate for an x-equation.