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# unit7:rational

### Unit 7: Rational Explorations: Numbers and their Opposites

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.
Coordinates An ordered pair, (x,y), that locates a point in a plane.
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,…}
Negative numbers The set of numbers less than zero
Opposite number Two different numbers that have the same absolute value. Example
Ordered Pair A pair of numbers, (x,y), that indicate the position of a point on the Cartesian Plane.
Origin The point of intersection of the vertical and horizontal axes of a Cartesian plane. The coordinates of the origin are (0, 0).
Positive number The set of numbers greater than zero.
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
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
Created by: mcrippen