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Chapter Two Key Vocabulary Terms
This is from 6th grade California Math
15
Mathematics
6th Grade
10/08/2011

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Term
integer
Definition
The set of whole numbers and their opposites {. . .-2, -1, 0, 1, 2. . .}.
Term
negative integer
Definition
Any integer that is less than zero.
Term
positive integer
Definition
Any integer that is greater than zero.
Term
absolute value
Definition
The absolute value of a number a is its The distance the number is from zero on a number line. Example: The absolute value of -2 is 2.
Term
plane
Definition
A two-dimensional flat surface that extends in all directions.
Term
coordinate plane
Definition
A plane, also called a coordinate grid or coordinate system, in which a horizontal number line and a vertical number line intersect at their zero points.
Term
x-axis
Definition
The horizontal number line on a coordinate plane.
Term
y-axis
Definition
The vertical number line on a coordinate plane.
Term
origin
Definition
The point (0, 0) in a coordinate plane where the x-axis and the y-axis intersect.
Term
quadrant
Definition
One of four regions into which the x- and y-axes separate the coordinate plane.
Term
ordered pair
Definition
A pair of numbers used to locate a point in the coordinate plane. An ordered pair is written in the form (x-coordinate, y-coordinate).
Term
x-coordinate
Definition
The first number in an ordered pair. It corresponds to a number on the x-axis.
Term
y-coordinate
Definition
The second number in an ordered pair. It corresponds to a number on the y-axis.
Term
opposites
Definition
Two integers are opposites if they are represented on the number line by points that are the same distance form zero, but on opposite sides of zero. The sum of two opposites is zero.
Term
additive inverse
Definition
The opposite of an integer. The sum of an integer and its additive inverse is zero.
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