Question

If equation of X - axis is y=k, then the value of k is

Answer 1

$\textbf{Finding the equation of X axis:}$

$\text{Since X axis makes 0^{\circ} to itself, we have}$

$\text{Angle of inclination, \theta=0^{\circ} }$

$\text{Slope of x axis, m=tan\,0^{\circ}=0 }$

$\text{The equation of x axis is}$

$y-y_1=m(x-x_1)$

$y-0=0(x-0)$

$\implies\bf\;y=0$

$\text{Comparing it with y=k, we get}$

$\bf\;k=0$

$\therefore\textbf{The value of k is 0}$