Question

The slope of the $x$-axis is .......... .

• A. $0$
• B. $1$
• C. $-1$
• D. $\sqrt{3}$

Answer 1

The correct option is A $0$

A horizontal line has slope $0$, because even though the value of $x$ changes, the value of $y$ does not change.

$\Delta y=0$.

$\therefore \frac{\Delta y}{\Delta x}=\frac{0}{\Delta x}=0$

Hence, the slope of the $x$-axis is $0$.