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# roland

### 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 |

slope | to have or take an inclined or oblique direction or angle considered with reference to a vertical or horizontal plane; slant. |

direct variation | mathematical relationship between two variables that can be expressed by an equation in which one variable is equal to a constant times the other |

x-intercept | the x-coordinate of a point where a line, curve, or surface intersects the x-axis |

linear equation | a first-order equation involving two variables: its graph is a straight line in the Cartesian coordinate system. |

is a point where the graph of a function or relation intersects with the y-axis of the coordinate system. | |

point-slop from | they give you a point (x1, y1) and a slope m, and have you plug it into this formula: y – y1 = m(x – x1) |

unit rate | describes how many units of the first type of quantity corresponds to one unit of the second type of quantity. |

slop-intercpt from | goes straight up and down, its slope is undefined. Also, the x value of every point on a vertical line is the same |

proportional relationship | are the comparison of two equal ratios. Therefore, proportional relationships are relationships between two equal ratios. |

rate of change | The slope of a line is a rate of change. |

intersecting lines | Two lines that cross each other. Lines intersect at one point unless the lines fall directly on top of each other |

Created by:
96LarBak