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# Chapter 7 Math Vocab

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

Graph | the point in the plane |

x-axis | the horizontal number line |

y-axis | the vertical number line |

Ordered Pair | if x=4 and y=7 they can be written as (4,7) |

Abscissa | the first number in an ordered pair |

Ordinate | the second number in an ordered pair |

Coordinates | the abscissa and ordinate |

Cartesian Coordinate System | the whole system- x-axis, y-axis, points in the plane |

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

Scale | a number placed every so many units |

Solution | an ordered pair that makes the equation a true statement |

Y Intercept | the value of y when x is 0 |

X Intercept | the value of x when y is 0 |

Rise | in going from one point to another in a Cartesian Coordinate System, the rise is the change in y |

Run | in going from one point to another in a Cartesian Coordinate System, the run is the change in x |

Slope | the slope of a line is the ratio |

Slope-Intercept Form | an eqution of the form y= mx+b, where m and b are constants, is in slope-intercept form. |

Slope of Horizontal Lines | horizontal lines have 0 for a slope |

Slope of Vertical Lines | vertical lines do not have a slope |

Point-Slope Form | an equation in the form y - y= m(x - x) is said to be in point-slope form. the slope is m, and a fixed point on the line is (x,y). the variables x and y stand for coordinates of a variable point on the line |

Equation of Horizontal Lines | if y= constant, the graph is a horizontal line |

Equation of Vertical Lines | if x= constant, the graph is a vertical line |

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

Solution of a System | an ordered pair that satisfies all the equations in the system |

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 |

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

Linear Combination | what you get by multiplying each quantity by a constant, then adding the results. the method is also called addition-subtraction |

Created by:
ianmorris