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# Math 7

### Chapter 1

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

Complex Fraction | A fraction a/b where a and b are fractions and b does not equal zero |

Constant of Proportionality | A constant ratio or unit rate of two variable quantities. It also is called the constant of variation |

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

Coordinate Plane | A plane in which a horizontal number line and a vertical number line intersect at their zero points |

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 or ratio that is not constant |

Proportional | The relationship between two ratios with a constant rate or ratio |

Ordered Pair | 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) |

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

Quadrants | One of 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 |

Slope | The rate of change between any two points on a line. It is the ratio of vertical change to horizontal change. The slope tells how steep the line is |

Unit Rate | A rate that is simplified so that is has a denominator of 1 |

X-axis | The horizontal number line in a coordinate plane |

Y-axis | The vertical number line in a coordinate plane |

Created by:
mbarkley