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# What is a manipulated variable?

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### Quick Answer

**The manipulated variable in an experiment is the independent variable; it is not affected by the experiment's other variables.** HowStuffWorks explains that it is the variable the experimenter controls. When there are control and experimental groups, the manipulated variable is the treatment supplied to the experimental group and denied the control group.

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When a scientist graphs the results of an experiment, he graphs the manipulated variable on the x-axis of the graph. One common manipulated variable is time. The scientist controls the time at which he makes the measurements. The y-axis represents the response or dependant variable. Temperature is a common response variable.

Because it is easy to confuse variables in the experiment, About.com offers the mnemonic DRY MIX to help students. It translates: dependant, response, y-axis; manipulated, independent, x-axis. Another way to help keep these values from being confused is through remembering that the independent variable is the "I do" variable.

In addition to manipulated variables and response variables, experiments often include controlled and extraneous variables. Controlled variables are those which the experimenter attempts to keep the same for both groups. Extraneous variables often change the outcome of the experiment in an accidental or unanticipated way. While the experimenter does not graph these variables, it is important for him to keep a record of them in his notes.

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Q:
## What is the precise definition of a limit in calculus?

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Full Answer >**The definition of a limit in calculus is the value that a function gets close to but never surpasses as the input changes.**Limits are one of the most important aspects of calculus, and they are used to determine continuity and the values of functions in a graphical sense.Filed Under: -
Q:
## What is the derivative of y = arctan(6x)?

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## What is the solution to sin(2x)+sin(x)=0?

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Full Answer >**The solutions to sin(2x)+sin(x)=0 is 0, 120 and 240 degrees.**The sin(2x) can also be expressed as 2sin(x)cos(x), making the equation 2sin(x)cos(x)+sin(x)=0.Filed Under: -
Q:
## How do you find the equation of the tangent line to the curve?

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