Respuesta :

a vertical line has an undefined slope.
vertical lines are X= something
in this case it needs to intercept 9.
so it is X=9
Calniz
Hey there, Stephenhernandez!

An equation of a line with an undefined slope will look like x = n
N = any number that passes through the x-intercept
In this case the x-intercept is 9
So the line will look like x = 9

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