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# Proportional Relatio

### Proportional Relationship

Question | Answer |
---|---|

Proportional Relationship | **A relationship where you can find one quantity and multiply it with another number to get the second quantity. **Has a constant |

Constant (of Proportionality) | **A number you use to MULTIPLY one quantity to get another quantity in a proportional relationship **You multiply the constant and X to get Y. |

How do you get the constant(k)? | k=y/x (divided) |

How many constants are there in a proportional relationship? | 2 |

How are the constants related to each other? | They are reciprocals of each other. |

Equivalent Ratios | **Have the same value **Can multiply one ratio to get another ratio. |

Unit Rate | A rate that is being compared to one of something. |

Equation of a proportional relationship | y=kx |

How do you know a graph is proportional? | Has a straight line and goes through (0, 0) |

Where is the constant on a graph? | When x = 1, the y value is the constant |