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# mhill ch 2

### 7th math

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

complex fraction | a fraction A/B where A or B are fractions and b does not equal zero. |

constant of proportionality | a constant ratio or unit rate of two variable quantities. It is also called the constant of variation. |

constant of variation | the constant ratio in a direct variation. It is also called the constant of proportionality. |

constant rate of change | the rate of change in a linear relationship. |

coordinate plane | a plane in which a horizontal number line and a vertical number line intersect at their zero points. Also called a coordinate grid. |

cross products | the product of the numerator of one ratio and the denominator of the other ratio. The cross products of any proportion are equal. |

dimensional analysis | the process of including units of measurement when you compute. |

direct variation | the relationship between two variable quantities that have a constant ratio. |

equivalent ratios | two ratios that have the same value. |

nonproportional | the relationship between two ratios with a rate of ratio that is not constant. |

ordered pair | a pair of numbers used to locate a point in the coordinate plane An ordered pair is always written in the form/order (x-coordinate, y-coordinate) |

origin | the point at which the x-axis and the y-axis intersect in a coordinate plane. The origin is at (0,0) |

proportion | an equation stating that two ratios or rates are equivalent |

proportional | the relationship between two ratios with a constant rate or ratio |

quadrants | one of the four regions into which the two perpendicular number lines of the coordinate plane separate the plane. |

rate | a ratio that compares two quantities with different kinds of units |

rate of change | a rate that describes how one quantity changes in relation to another. A rate of change is usually expressed as a unit rate. |

unit rate | a rate that is simplified so that it has a denominator of 1 unit. |

unit ratio | a unit rate where the denominator is one unit. |

x-axis | the horizontal number line in a coordinate plane |

x-coordinate | the first number of an ordered pair. It corresponds to a number on the x-axis. |

y-axis | the vertical number line in a coordinate plane. |

y-coordinate | the second number of an ordered pair. It corresponds to a number on the y-axis |

Created by:
MrsSheBro