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# Chapter 5 Math Vocab

### Math Vocabulary

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

Complex Fraction | is a fraction that has at least one fraction in the numerator, denominator, or both. |

Constant Of Proportionally | is the number k in the direct variation equation. The constant of proportionally in the equation y=2x is 2 |

Coordinate plane | a coordinate plane is formed by the intersection of a horizontal number line and a vertical number line. |

Cross products | in a production a/b = c/d the products a times b and b times c are called cross products |

Cross Products Property | the cross products that are proportional are equal. |

Direct Variation | two quantities x and y show direct variation when y = kx, where k is a number and k is not is not equal to 0 |

Ordered pair | a pair of numbers (x,y) used to locate a point in a coordinate plane; The first number is the x-coordinate, and the second number is the y-coordinate |

Origin | the point, represented by the ordered pair (0,0), where the horizontal and vertical numbers lines intersect in a coordinate plane |

Proportion | an equation stating that two or more ratios are equivalent |

Proportional | two quantities that form a proportion are proportional |

Quadrants | the four regions created by the intersection of the horizontal and the vertical lines in a coordinate plane |

Rate | a ratio of two quantities using different units |

Ratio | a comparison of two quantities using division |

Ratio Tables | a table used to find and organize equivalent ratios |

Slope | the slope m of a line is a ratio of the change in y (the rise) to change in x (the run) between any two points it is a measure of the steepness of a line. |

Unit Rate | a rate with a denominator of 1. |

X axis | the horizontal line in a coordinate plane |

Y axis | the first coordinate in an ordered pair, which indicates how many how many units to move to the left or right from the origin |

Y coordinate | the second coordinate in an ordered pair, which indicates how many units to move up or down from the origin. |

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