An independent variable is a. directly changed by the experimenter. b. manipulated by changes to the dependent variable. c. a variable that is kept constant. d. a variable that is used as a control.
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ANSWER:c. a variable that is kept constant.
Explanation:
In the scientific terms we can say that a variable is an element,factor or feature which is liable for vary of it's numeric value.
There are mainly three types of variables , independent ,manipulated and dependent variable.
According to the question;
An independent variable is
c.variable that is kept constant.
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