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DOMAIN AND RANGE
Things you need
to know
What is domain?
Domain: The domain of a function
is the set of all possible input values
(usually x), which allows the function
formula to work.
Basically, domain is all of the
x values that are within the function
that is graphed.
The domain of this graph is
-2 < x < 4
The if the line is continuous beyond our view, it becomes
-infinity < x < infinity
what is range?
range: The range of a function
is the set of all possible input values
(usually y), which allows the function
formula to work.
Simply, range is the y values that go
from positive to negative within a
graphed function.
Therefore, the range of this graph is
-2 < y < 3
As with domain, if the graph extends beyond our view,
it then becomes -infinity < y < infinity
Helpful Videos
1: http://www.youtube.com/watch?v=I0f9O7Y2xI4
2: http://www.youtube.com/watch?v=7Hg9JJceywA
3: http://www.youtube.com/watch?v=GW3Sq6Ez9zA
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