SOLUTION: what is the verticle line through (9,6)

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Question 273662: what is the verticle line through (9,6)
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
Vertical not verticle
Which would be vertical? Which would be horizontal?
x=9 or y=6?
If y is always 6 then x can be anything! So that is a horizontal line since the height (y) never changes the slope is zero.
so we want x=9 since the run never changes. the slope is undefined for x=9