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# PHMS7_PACH1

### 7th Grade Pre Algebra Words

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

algebra | a branch of mathematics dealing with symbols |

algebra expression | an expression that contains sums and/or products of variables and numbers |

coordinate plane | another name for coordinate system |

coordinate system | a coordinate system is formed by the intersection of two number lines that meet at right angles at their zero points, also called a coordinate plane |

counterexample | an example that shows conjecture is not true |

deductive reasoning | the process of using facts, properties, or rules to justify reasoning or reach valid conclusions |

defining a variable | choosing a variable and a quantity for the variable to represent in an equation |

domain | the domain of relation is the set of all x-coordinates from each pair |

equation | a mathematical sentence that contains an equal sign (=) |

evaluate | find the numerical value of an expression |

function | a function is a special relation in which each element of the domain is paired with exactly one element in the range |

function rule | the operation performed on the input of a function |

function table | a table organizing the input, rule, and output |

graph | a dot at the point that corresponds to an ordered pair on a coordinate plane |

numerical expression | a combination of numbers and operations such as addition, substraction, multiplication, and division |

order of operations | the rules to follow when more than one operations is used in an expression. Think PEMDAS ***MD left to right and ***AS left to right |

ordered pair | a pair of numbersused to locate any point on a coordinate plane |

origin | the point at which the number lines intersect in a coordinate system |

properties | statements that are true for any numbers |

range | the range of a relation is the set of all y-coordinates from each ordered pair |

relation | a set of ordered pairs |

scatter plot | a graph that shows the relationship between two set of data |

simplify | to write an expression in a simpler form |

variable | a placeholder for any value |

x-axis | the horizontal number line which helps to form the coordinate system |

x-coordinate | the first number of an ordered pair |

y-axis | the vertical number line wich helps to form the coordinate of a point where a graph crosses the y-axis |

y-coordinate | the second number of an ordered pair. |

Created by:
szimmerman