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A student decides to be the subject in her own experiment. She wants to know how the amount of time she spends studying for a test affects the grade she makes on the test. For one semester she keeps careful records of time spent studying and the resulting test grade. She makes a scatter plot of her results.

What type of variable is study time in this experiment?


controlled variable


responding variable


test variable (independent variable)


outcome variable (dependent variable)

A student decides to be the subject in her own experiment She wants to know how the amount of time she spends studying for a test affects the grade she makes on class=