The Dependent Variable is the thing you are observing
ex: what liquid freezes first
The Controlled variables are the things that you keep the same
ex: the temp., the amount, the time,
The Independent variable are the things that you change
ex: the liquid
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the three kinds of variables are independent,dependent and controlled
variables, coefficents, and constants
It is an expression in three variables, x, y and z.
Time, distance, colour.
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