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6. Alex wanted to find out what toothpaste made teeth the cleanest. Everyday she brushed her teeth with a different product and then took a plaque test to see how much plaque was left. She used Crest, Colgate, Close-up, and water. a. Independent Variable (IV): b. Dependent Variable (DV): c. Control: d. Constants:
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6. Alex wanted to find out what toothpaste made teeth the cleanest. Everyday she brushed her teeth w...
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