What is the equation of the Y-axis?

Описание: What is the equation of the Y-axis? In this quick 30-second short, we explain why the equation of the Y-axis is written as x = 0 and what this really means in coordinate geometry. If you’ve ever wondered why vertical lines have this special equation, this short will clear it up instantly!

When we draw the coordinate plane, the Y-axis is a vertical line passing through the origin. For any point on the Y-axis, the x-coordinate is always 0, while the y-coordinate can take any value. That’s why the equation of the Y-axis is x = 0.

This is an essential concept in Coordinate Geometry and forms the foundation for understanding the equations of lines, parallel lines, and graphs in algebra. You’ll encounter this topic in CBSE Class 9 & 10 Maths, ICSE Maths, IGCSE, Cambridge Maths, and in competitive exams as well.

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