Page 214 - Mathematics GRADE 9, DE-STREAMED (MTH1W)

density
The concept that between any given two real numbers, there will always be another real number. Thus, there are infinitely many real numbers between any two real numbers. See also infinity, real number.
dependent variable
A variable whose value depends on the value of another variable for a particular situation. For example, in the expression d = vt, distance (d) depends on velocity (v) and time (t). In graphing, the dependent variable is usually represented on the vertical axis of a Cartesian plane. See also independent variable, variable.
depreciation
A decrease in value of an asset or a currency.
dispersion
The spread of values in a data set.
earning
Obtaining money in return for labour or services. See also income.
equation
A mathematical statement that has equivalent expressions on either side of an equal sign.
evaluate
To determine a value for an expression.
expenses
Things that one spends money on; for example, most adults’ expenses include food, shelter, utilities, and entertainment.
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