a symbol that can be replaced by any member of a set of numbers or other objects.

A correspondence or pairing between two variables such that each value of the first(independent) variable corresponds to exactly one value of the second(dependent) variable.

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Chapter 1 alg 2

Question	Answer
Variable	a symbol that can be replaced by any member of a set of numbers or other objects.
Function	A correspondence or pairing between two variables such that each value of the first(independent) variable corresponds to exactly one value of the second(dependent) variable.
counting numbers	1,2,3,4,5,6,7,8,9,10
whole numbers	0,1,2,3,4,5,6,7,8,9,10
integers	...-3,-2,-1,0,1,2,3...
rational numbers	non whole numbers
rear numbers	all numbers