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# Ch 7 Math Vocab

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

Equations of Horizontal and Vertical Lines | If y= constant, the graph is a horizontal line If x= constant, the graph is a vertical line |

Solution, Equation Containing two Variables | When an equation with two variables is an ordered pair that makes the equation a TRUE statement |

Substitution | A method of solving a system of equations by solving one equation to get one of the variables and substituting the result in the other equation |

X- axis and Y- axis | The two number lines |

Ordered Pair | (number, number) |

Slope | The ratio of a line rise ---- run |

System of Equations | two or more equations with the same variables |

Linear Combination or Addition- Subtraction | The result after multiplying two quantities by a constant, then adding the results |

Scale | Putting a number every 5 units on the two axes |

Graph | The point on the plane |

Quadrants | The axes divide the graph paper into four regions |

Slope of Horizontal Lines | 0 |

Slope of Vertical Lines | No slope |

Abscissa | The first number in an ordered pair |

Point - Slope form of a Linear Equation | An equation in the form y-y1=m(x-x1) The slope is m, and a fixed point on the other line is (x,y). The variables x and y stand for coordinates of a variable on the line |

Y-Intercept | The value of y when x is 0 |

X-Intercept | The value of x when y is 0 |

Slope- Intercept Form | An equation of the form y=mx+b, where m and b are constants -The constant m is the slope -The constant b is the y-intercept |

Solution of a System | An ordered pair that satisfies ALL the equations in the system |

Solution Set | The set of all solutions to an equation |

Coordinates | To gather the two numbers (number,number) which create a point in a plane |

Cartesian Coordinate System | The whole system- x-axis, y-axis, points on the plane; named after Rene Descartes |

Run | The change in x when going from one point to another on the Cartesian Coordinate System |

Rise | The change in y when going from one point to another on the Cartesian Coordinate System |

Ordinate | The second number in an ordered pair |

Simultaneous Equations | Equations in a system that can be solved at the same time |

Created by:
mthibault