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Aidan wrote the interval (-5, 4) and claimed it was equivalent to the graph below. Explain what he did
wrong and correct his mistake.
Aidan just made one tiny mistake. They used a parenthese at the front which would mean that the -5 is not included in the interval. But the closed, colored-in dot on the graph means that the -5 IS supposed to be included. So the proper symbol to start the interval would be the square bracket to indicate the -5 is included. So it should be [-5, 4)
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