Posted by MATH DUDE on Monday, January 3, 2011 at 10:06pm.
Explain how to know wheather the endpoint of the graph of an inequality should be a closed dot or an open dot.

MATH PREALGEBRA  Jen, Monday, January 3, 2011 at 10:16pm
It should be an open dot because it's an inequality. It would be a closed dot if it was an equality, such as x=3.

MATH PREALGEBRA  Reiny, Monday, January 3, 2011 at 10:26pm
If the inequality contains either ≤ or ≥, then close the dot of the endpoint, since that point is included in the graph.
If the inequality contains eitehr < or > , then leave the dot open to show that the endpoint itself is not included in your graph.

MATH PREALGEBRA  kim, Tuesday, September 20, 2011 at 5:32pm
yes! if it is addition or subtraction you have an open dot! if it multiplication or division than a closed dot!
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