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Secondary 3 Maths
20. Linear equations (Advanced)
20.4 Special case of linear equations: Vertical lines
Special case of linear equations: Vertical lines
What You'll Learn
Recognize that vertical lines occur when all x-coordinates are identical
Identify undefined slope as the characteristic of vertical lines
Write equations for vertical lines in the form x = a
Distinguish vertical lines from other linear equations like y = mx + b
What You'll Practice
1
Writing equations for vertical lines given two points with same x-value
2
Determining vertical line equations from a single point
3
Identifying possible coordinates on a vertical line with undefined slope
Why This Matters
Understanding vertical lines completes your knowledge of special linear cases. Recognizing undefined slopes and vertical line equations is essential for graphing, analyzing functions, and solving real-world problems where certain values remain constant.
Before You Start — Make Sure You Can:
This Unit Includes
4 Video lessons
Practice exercises
Learning resources
Skills
Vertical Lines
Undefined Slope
Linear Equations
Graphing
Coordinate Geometry
