Answer :
Solution:
The slope of a line gives the steepness of the line.
It is evaluated as
[tex]\begin{gathered} m=\frac{\text{rise}}{\text{run}} \\ =\frac{y_2-y_1}{x_2-x_1} \end{gathered}[/tex]The higher the slope value, the steeper the slope.
Thus, a slope of 999 will have a nearly vertical line.