The equation of a vertical line is of the form:
[tex]x=k[/tex]A vertical line has an infinite slope. The slope-intercept form of a line equation is:
[tex]y=mx+b[/tex]where "m" is the slope and "b" is the y-intercept. The equation of a vertical line has an undefined slope because the denominator of the slope, i. e, the change in the "x" variable is zero. Therefore, it cannot be written as a slope-intercept form.
