The horizontal line y = 4 passes through the y-axis at which point?

1. A horizontal line y = b always passes through the y-axis at the point (0, b). 2. For the line y = 4, substituting b = 4 gives the point (0, 4). 3. Swapping the coordinates to (4, 0) would instead describe a point on the x-axis, not the y-axis. _Source: OpenStax Elementary Algebra (CC BY 4.0), Ch 4 "Graphs", section 4.2 Graph Linear Equations in Two Variables_