The slope of the given line [tex]x = 9[/tex] is undefined.
The slope-intercept form of a straight line is [tex]y = mx + c[/tex].
Here, 'm' is the slope of the line and 'c' is the y-intercept of the line.
The equation of the given line is
[tex]x = 9[/tex]
The given line is a vertical line passes through the point (9, 0).
Therefore, slope of this line is undefined.
Learn more about the slope of a line here: https://brainly.com/question/2113601
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