Independent variables are ones that are not impacted by outside forces or other factors. Dependent variables are the ones that are impacted by other elements and need other elements in order to function.
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Free from outside control means Independent . While dependent Is opposite.
X-y graph
Usually the independent variable is plotted on the horizontal, and the dependent is plotted on the vertical. Example if you're graphing distance vs time, then time is the independent variable, because time keeps going independent of how you are moving.
Independent . . . what substance the 7th grader drinks Depoendent . . . his pulse rate
An independent variable is what you change during an experiment, and a dependent variable is what gets changed. for example, if you are monitoring temperature vs size of plants. Everyday you change the temperature, and then record the size of the plants. Therefore, the temperature is the ind. variable and the size of the plants is the dep. variable.