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# Tech Math II CH. 7

### Tech Math II MPHS Chapter 7

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

direct variation | A linear function defined by an equation of the form y = kx, k does not equal 0. You say that y is directly proportional to x. |

rise | the vertical change between two points on a line. |

diameter | a segment that joins two points of the circumference with the center of the circle. |

arc | Part of a circle. Any angle |

dimensional analysis | A problem solving strategy where you cancel units of measurement as if they are numbers. |

variation constant | The linear function defined by an equation of the form y = kx, k does not equal 0. You say that y is directly proportions to x. |

run | The horizontal change between two points on a line. |

circumference | The perimeter of a circle. The distance around the circle. |

arc length | The measurement of an arc. |

sector | The region formed by a centrai angle and its arc is a sector. |

variation | The nonzero constant k in a direct variation defined by y = kx. |

slope | The measure of the steepness of a line given by the ratio of rise to run for any two points on the line. |

pi | The ratio of circumference to diameter is a constant. |

general form for direct variation | ratio of quantites = variation constant |

tangent ratio | The ratio compares the two legs of a right triangle. leg opposite / leg adjacent. |

conversion factor | A conversion factor is a ratio of two equal(or approximately equal) quantites that are measured in different units. |

Created by:
bunnych