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# 7th Math Mod2

### Rates and Proportionality

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

constant | a value that does not change |

equivalent ratio | ratios that name the same comparison |

percent | a ratio comparing a number to 100 EX: 45% = 45/100 |

rate | a ratio that compares two quantities measured in different units EX: Miles per hour |

ratio | a comparison of two quantities by division EX: can be written as 2:5, 2 to 5 or 2/5 |

complex fraction | a fraction that contains one or more fractions in the numerator, the denominator or both EX: (1/2)/(3/4) |

constant of proportionality | a constant ratio of two variables related proportionally |

proportion | an equation that states that two ratios are equivalent EX: 3/4=6/8 |

proportional relationship | a relationship between two quantities in which the ratio of one quantity to the other quantity is constant |

rate of change | a ratio that compares the amount of change in a dependent variable to the amount of change in an independent variable EX: (change in cost)/(change in time) |

unit rates | a rate in which the second quantity in the comparison is one unit EX: 10cm per minute |

Created by:
ashaver