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Graph x is less than 4.
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So let's draw ourselves
a number line over here.
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So let me draw a number line.
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I'll start here at 0,
so 0, 1, 2, 3, 4, 5.
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And we could go below 0.
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We'd have negative 1, negative
2, negative 3, negative 4.
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I could keep going.
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Now, we want to graph all of
the x's that are less than 4,
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but we're not including 4.
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It's not less than
or equal to 4.
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It's just less than 4.
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And to show that we're not
going to include 4, what we're
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going to do is we're going
to draw a circle around 4.
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So this shows us that
we're not including 4.
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If we were including 4, I
would make that a solid dot.
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And to show that we're going to
do all the values less than 4,
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we want to shade
in the number line
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below 4, going down
from 4, just like that.
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And then we can just shade
in the arrow just like that.
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So this right here is all
of the values less than 4.
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And you could test it out.
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Take any value
where there's blue.
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So there's blue over
here, negative 2.
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Negative 2 is
definitely less than 4.
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If you take this value
right here, this 2,
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it's definitely less than 4.
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4 is not included because
4 is not less than 4.
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It's equal to 4.
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5 is not included because
5 is not less than 4.