Question

Find the slope of the line whose inclination is ${90}^o$.

Answer 1

We know that if $\theta$ is the inclination of a straight line, then $\tan \theta$ is called the slope (or gradient) of a line. The slope of a line is usually denoted by $m$.

Here, it is given that $\theta ={90}^0$, therefore, the slope of the line is:

$m=\tan {90}^0=$ Not defined

Hence, the slope of the line is not defined.