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What is the slope of the x-axis?

AFive
BZero
CNine
DFour
Answer & Solution
Correct answer: B. Zero
1. The x-axis is horizontal, so its inclination is nothing. 2. The tangent of nothing is nothing. 3. The slope of the x-axis is zero. 4. The slope of the y-axis, by contrast, is not defined. _Source: syllabus Mathematics, Ch 9 'Straight Lines'_
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