Since you are looking at the proposition that a good balanced breakfast helps concentration then the independent variable is a good balanced breakfast.
However, if your study was simply looking at the relationship between a good balanced breakfast and concentration in school, either variable could be the independent variable. It could be argued that only by concentrating in school would you learn what a good balanced breakfast was.
Breakfast
Breakfast
Concentration of the liquid.
It depends on which variable is independent, and which one is dependent (its value is determined by a function of the independent variable). So suppose that concentration is a function of an arbitrary length (the length is what determines concentration). The independent variable (length) is put on the horizontal axis, and the dependent variable (concentration) is put on the vertical axis.
Concentration of sugar in the water
The independent variable.
Independent, it is in the name, more variables are: dependant variable- the one you keep the same control variable- mearsuring variable
Changes in the independent variable are independent of changes in any other variable,
To find out how enzyme concentration affects the activity of the enzyme you must:vary the concentration of the enzyme, by preparing different concentrations (keeping the volume of solution the same)keep the temperature, substrate concentration and pH constantmeasure the activity of the enzyme at each concentrationHow the enzyme activity is measured will depend on the specific enzyme involved.You need to have plenty of substrate (excess substrate) so it doesn't run out during the experiment.In this type of experiment, the enzyme activity is the dependent variable, the temperature, pH and substrate concentration are control variables and the enzyme concentration is the independent variable.
The independent variable.
the dependent variable changes with the independent variable. the independent variable only changes when changed by the experimenter. Time is usually an independent variable.
The independent variable of an experiment is the variable that you change, and the dependent variable is the result of the independent variable.