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# Unit 2 Vocabulary M

### Rational Explorations: Numbers and their Opposites

Term | Definition |
---|---|

Absolute Value | The distance between a number and zero on the number line. The symbol for absolute value is shown in the equation |β8| = 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, (π₯, π¦), that locates a point in a plane. |

Distance | The 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 {β¦ β 3, β2, β1, 0, 1, 2, 3, β¦ } |

Magnitude | Greatness in size or amount. |

Negative Numbers | The set of numbers with a value less than zero. |

Opposite Numbers | Two different numbers that have the same absolute value. Example: 4 and β4 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,(π₯, π¦), that indicate the position of a point on the Cartesian coordinate Plane. |

Origin | he 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. |

Positive Numbers | The set of numbers whose value is greater than zero. |

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 ab where a and b are integers and π β 0. |

Sign | A symbol that indicates whether a number is positive or negative. Example: in β4, the (β) sign shows this number is read βnegative fourβ. |

x-axis | The horizontal number line on the Cartesian coordinate plane. |

x-coordinate | The first number in an 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:
hmcbride