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# Unit 3 vocabulary

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

constant of proportionality | the constant value of the ratio of two proportional quantities x and y; usually written y=kx where k is the factor of proportionality |

direct variation | a relationship between two variables wherein their ratio remains constant. An equation or function expressing such a relationship |

linear equations | in which each term is either a constant or the product of a constant and a single variable |

slope | the ratio of the verticle and horizontal changes between two points on a surface or a line |

x-intercept | The point where a line meets or crosses the x-axis |

y-intercept | The point where a line meets or crosses the y-axis |

unit rate | The estimated market value contribution for each unit of an improvement. |

slope intercept form | A linear equation is an algebraic equation in which each term is either a constant or the product of a constant and a single variable |

point-slope form | the equation of a straight line in the form y − y1 = m(x − x1) where m is the slope of the line and (x1,y1) are the coordinates of a given point on the line |

proportional relationship | Two quantities are proportional if they vary in such a way that one of them is a constant multiple of the other. |

rate of change | Momentum and rate of change are simple technical analysis indicators showing the difference between today's closing price and the close N days ago |

intersecting line | he notion of line or straight line was introduced by ancient mathematicians to represent straight objects with negligible width and depth. Lines are an idealization of such objects |

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jajakyr