Identify points lying on the line y=2.
Check the y-coordinate; it must equal 2.
A horizontal line has a constant y-value. Any point with y=2 lies on the line y=2, regardless of x. Understanding horizontal lines is crucial for graphing, intersections, and solving coordinate geometry problems. Practice plotting points on horizontal lines and verify their y-values. This concept also applies to vertical and diagonal lines, helping visualize the coordinate plane clearly.