Equations of Vertical and Horizontal Lines
Learning Objective
I can write equations for vertical and horizontal lines.
Key Concepts
The slope of a horizontal line is always zero, and its equation is in the form y = a constant.
The slope of a vertical line is undefined, and its equation is in the form x = a constant.
To avoid mixing up x and y, remember that vertical lines have equations of the form x = a number, because every point on the line has the same x-coordinate.
Practice Questions
This lesson includes 11 practice questions to reinforce learning.
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1. What is the equation of a horizontal line that passes through the point (0, -5)?
2. What is the equation of a vertical line that passes through the point (7, 0)?
3. A horizontal line has the equation y = 2. What is the y-coordinate of any point on this line?
...and 8 more questions
Educational Video
■ Horizontal & vertical line equations - how to find them!
maths unboxed