The slope of vertical line is?
- Defined
- Undefined
- 0
- None of these
Explanation
Slope m = (y₂ - y₁)/(x₂ - x₁)
For a vertical line, x stays the same for all points → x₂ - x₁ = 0
So m = something / 0 → division by zero = undefined/infinite
Last verified on 08-06-2026
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