In an inequality (Ex: 8>4) and graphing it, there are two symbols we use, an arrow that originates at an open dot, and an arrow that originates at a closed dot. If it's a greater than or equal to sign, you use a closed dot, if it's a greater than sign, it needs an open dot. The open dot means that it can't be equal to the number (Ex: 8>4, you don't count the four). It's like the number falls through the hole. A closed dot
 





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