Vertical is a relative term. It usually refers to a direction pointing in the opposite direction of Gravity.
So if you are in outer space, then I guess there is no real "vertical" direction.
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Vertical goes up and down.
A vertical line goes up and down otherwise to say it goes straight up
The way to remember it is horizontal is like the horizon, so flat like this: ___________________________________________________________ That was a horizontal line. Vertical is the other way (so up and down): | | | | | | | That was a vertical line.
One way to find a vertical asymptote is to take the inverse of the given function and evaluate its limit as x tends to infinity.
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