Analyzing unbounded limits: rational function | AP Calculus AB | Khan Academy

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Sal analyzes the behavior of f(x)=-1/(x-1)_ around its asymptote at x=1.
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[@cora5515]

I can't believe it took me five minutes to learn something my teacher (in my case, as I'm terrible at interpreting graphs and much prefer this table method) failed to do in forty minutes. Thanks so much!

[@chelseatoilet8820]

what if it's approaching a y value that is undefined?

[@cornationboot8690]

wait how is it minus when it approaches from right, it will be positive infinity

[@totoblox4242]

Because there’s a negative sign in front of the function

[@josephnash9771]

First