Your hypothesis contains 2 types of variables. A variable is something that can vary or change. The independent variable is the one that is changed on purpose and the dependent variable is the one that changes when you change the independent variable. It depends on the independent variable. Consider this question:
Does fertilizer make a plant grow bigger?
What do you think is the dependent variable?
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The dependent variable in this question would be the size or growth of the plant. It is the variable that is expected to change as a result of changing the independent variable (fertilizer).
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