The Y-Axis is which type of line on a graph?

• A. The horizontal line
• B. The vertical line
• C. The diagonal line
• D. The curved line

Answer: (B)

The Y-Axis is a vertical line on a graph. It runs up and down at x = 0 and is perpendicular to the X-Axis, which is horizontal. The Y-Axis is where the y-values are plotted as you move along the horizontal direction, showing how the dependent variable changes. Horizontal lines, diagonal lines, and curved lines are different kinds of lines that can appear on a graph, but the Y-Axis itself is specifically the vertical reference line.