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When does a slope equal zero and when is it undefined

User DenisGL
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2 Answers

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When the slope is a horizontal, or a vertical straight line, that means that the slope is undefined, and therefore equates to 0.
User Bjornasm
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Answer:

an undefined and zero slope occurs when either the numerator or denominator equals zero.

Explanation:

User Vinod Srivastav
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