Dependent & independent variables | Algebra (video) | Khan Academy
https://www.khanacademy.org/math/algebra-home/alg-intro-to-algebra/alg-dependent-independent/v/dependent-and-independent-variables-exercise-example-1
WEBThe dependent variable is the one that depends on the value of some other number. If, say, y = x+3, then the value y can have depends on what the value of x is. Another way to put it is the dependent variable is the output value and the independent variable is the input value. So for y=x+3, when you input x=2, the output is y = 5.
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