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# Pre-Algebra Unit 1

### Zaher's Linear Functions Vocabulary

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

Input | A value that are substituted into an equation. |

Output | The value that results after a value is substituted into an equation. |

Domain | All the values that go into a function. |

Range | All the output values of a function. |

Function | An equation that generates one specific value for a given value. |

Linear Function | A function that creates a straight line when graphed. |

Rate | A ratio of two different quantities that have different units of measure. |

Unit Rate | A comparison of two different measurements where one of the terms is 1. |

65 MPH is an example of what? | Unit Rate |

Coordinate Plane | 2 dimensional surface on which points are plotted and locateable. |

How do you graph (4, 7)? | Starting at (0,0), go right 4 then up 7. Place your point here. |

Proportional | When 2 quantities change at the same constant rate and pass through (0,0). |

Non-Proportional | When 2 quantities change at different rates OR do not pass through (0,0) OR both of these. |

Is the function y = 6x proportional or non-proportional? | Proportional |

What is the y-intercept of y = 6x? | 0 |

What is the slope of y = 6x? | 6 or 6/1 |

What is the Rate of Change of y = 6x? | 6 or 6/1 |

What is the formula for Rate of Change? | the difference in the y's over the differences in the x's |

What is the formula for Slope? | the difference in the y's over the differences in the x's |

What is the slope of y = -8x + 4 ? | -8 |

What is the slope of y = x + 9 ? | 1 |

What is the Rate of Change of y = -x + 11 ? | -1 |