Question

7) Using the table and information, choose the correct answer. A student notices that he does better on tests if he sleeps for at least 8 hours. He decides that for the next 3 tests he has in science class, he will sleep different amounts of times and see how he does on his tests. For his next science test, he sleeps only 4 hours the night before, 6 hours before the next test, and 8 hours before the final exam. The chart shows his data. Test Hours of Sleep Grade 1 4 56 2 6 75 3 8 80 What is the independent variable? grade hours of sleep science test

Answer 1

The independent variable is the variable that is being manipulated. In this case, the independent variable is the hours of sleep.

In an experiment, we must have at least two variables;

• Independent variable
• Dependent variable

The independent variable is the variable that we have to change frequently. The variable that changes due to changes made in the independent variable is called the dependent variable.

As such, the student is varying his/her hours of sleep and observing its effect on test performance.

The hours of sleep that is being varied is the independent variable.

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