Posted by Mike on Thursday, October 15, 2009 at 11:00pm.
: Describe what the graph of interval [4,10] looks like.

Algebra 1  Alyson, Thursday, October 15, 2009 at 11:04pm
You would plot a dot at 4 on the x line(which is the horizontal line) on the left side of the graph, and you would plot a dot at 10 on the y linewhich is the vertical line and the positive numbers are above the horizontal xline.

Algebra 1  MathMate, Thursday, October 15, 2009 at 11:34pm
If I understand correctly that you need the graph of the interval [4,10], then it should be plotted on the number line, basically the xaxis.
Since [4,10] is the same as
4 ≤ x ≤ 10,
we start by joining 4 and 10 on the number line with a thick line. Since 4 and 10 are both included in the interval (indicated by the square brackets [ and ]), you would plot a dark, filled small circle at 4 and 10 to indicate that the two values are included in the interval.
For extra leisure reading about intervals, there is an excellent article:
http://en.wikipedia.org/wiki/Interval_(mathematics)
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