# Economic Definition of b. Defined.

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**Term b Definition**: The common notation for the "slope" term of an equation specified as Y = a + bX. Mathematically, the b-slope term indicates the change in the value of the Y variable resulting from a unit change in the value of the X variable. Theoretically, the b-slope is frequently used to indicate endogenous or dependent relation between the Y and X variables. For example, if Y represents consumption and X represents national income, b measures induced consumption expenditures.

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