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: NCERT Class XI Mathematics, Ch 9 'Straight Lines'_
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