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A variable is an alphabetic character representing a number that is not fully specified or unknown. Making algebraic computations with variables as if they were explicit numbers allows one to solve a range of problems in a single computation.
Discrete Function - A function that is defined only for a set of numbers that can be listed, such as the set of whole numbers or the set of integers. Explicit Definition - A definition of a function by a formula in terms of the variable.
Independent variable is the variable that you change in an experiment.
a standardizing variable is a variable that has a mean of zero and a standard deviation of one .
State what the variable represents in the equation.