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There are
the three neighborhoods that this graph lives in:
Let's
look at the left neighborhood:
* Remember your
2
sentences!
Since
he's a function (and must
pass the vertical line test), he can't do both.
What did
we say about crossing the x-axis for this guy?
(Look back if you need to.)
Yep --
he's not allowed to cross the x-axis! But, look at
that bottom guy:
But, he's
not allowed to -- so, he's got to live upstairs!
We can
use the same reasoning for the right neighborhood:
Continued on the
next
page
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