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Dispersion: The scattering of the values of a frequency
distribution (of data) from an average.
Distributive property: Property indicating a special way
in which multiplication is applied to addition of two (or more)
numbers. For example,
5 x 23 = 5 x (20 + 3) = 5 x 20 + 5 x 3 = 100 + 15 = 115.
Expanded notation: Showing place value by multiplying each
digit in a number by the appropriate power of 10. For example,
523 = 5 x 100 + 2 x 10 + 3 x 1 or 5 x 102 + 2 x 101 + 3 x 100.
Exponential function: A function that can be represented
by an equation of the form
y = abx + c, where a, b, and c are arbitrary, but fixed, numbers
and a 0 and b > 0 and
b 1.
Exponential notation (exponent): A symbolic way of showing
how many times a number or variable is used as a factor. In the
notation 53, the exponent 3 shows that 5 is a factor used three
times; that is 53 = 5 x 5 x 5 = 125.
Frequency distribution: An organized display of a set of
data that shows how often each different piece of data occurs.
Function: A relationship between two sets of numbers or
other mathematical objects where each member of the first set
is paired with only one member of the second set. Functions can
be used to understand how one quantity varies in relation to (is
a function of) changes in the second quantity. For example, there
is a functional relationship between the price per pound of a
particular type of meat and the total amount paid for ten pounds
of that type of meat.
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