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Unit 7: Rational Explorations: Numbers and their Opposites
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Terms in this set (20)
Absolute value
The distance between a number and zero on the number line. The symbol for absolute value is shown in the equation |−8| = 8.
Cartesian Coordinate Plane
A plane containing two perpendicular axes (x and y) intersecting at a point called origin (0, 0).
Coordinates
An ordered pair, (𝑥, 𝑦), that locates a point in a plane.
Distance
Amount of separation between 2 points.
Inequality
Any mathematical sentence that contains the symbols > (greater than), < (less than), < (less than or equal to), or > (greater than or equal to).
Integers
The set of whole numbers and their opposites {... − 3, −2, −1, 0, 1, 2, 3, ... }
Magnitude
Greatness in size or amount •
Negative numbers
The set of numbers with a value less than zero
Opposite number
Two different numbers that have the same absolute value. Example: 4 and −4 are opposite numbers because both have an absolute value of 4. They are the same distance from zero, in opposite directions.
Ordered Pair
A pair of numbers,(𝑥, 𝑦), that indicate the position of a point on the Cartesian coordinate Plane.
Origin
The point of intersection of the vertical and horizontal axes of a Cartesian coordinate plane. The coordinates of the origin are (0, 0).
Polygon
A closed figure formed by three or more line segments. •
Quadrant
One of the four regions on a Coordinate plane formed by the intersection of the x-axis and the y-axis.
Rational number
The set of numbers that can be written in the form 𝑎 𝑏 where a and b are integers and 𝑏 ≠ 0.
Sign
A symbol that indicates whether a number is positive or negative. Example: in −4, the (−) sign hows this number is read "negative four".
x axis
The horizontal number line on the Cartesian coordinate plane.
x coordinate
The first number of in ordered pair; the position of a point relative to the vertical axis
y axis
The vertical number line on the Cartesian coordinate plane
y coordinate
The second number in an ordered pair; the position of a point relative to the horizontal axis
Positive number
The set of numbers whose value is greater than zero.
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