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# Ch 2 Vocab

### contains vocab from Chapter 2

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

Natural Number | The set {1, 2, 3, ...} |

Whole Number | The set {0, 1, 2, 3, ...} |

Integers | The set {..., -2, -1, 0, 1, 2, ...} |

Positive Number | Any value that is greater than zero |

Negative Number | Any value less than zero |

Rational Numbers | The set of numbers expressed in the form of a fraction a/b, where a and b are integers and b ≠ 0 |

Infinity | Lines and sets that never end continue to infinity |

Graph | To draw, or plot, the points named by certain numbers or ordered pairs on a number line or coordinate plane |

Coordinate | The number that corresponds to a point on a number line |

Absolute Value | The absolute value of a number n is its distance from zero on a number line and is represented by ∣n∣ |

Opposites | Every positive rational number and its negative pair |

Additive Inverses | A number and its opposite are additive inverses of each other. The sum of a number and its addictive inverse is 0 |

Line Plot | A number line labeled with a scale to include all the data with an X placed above a data point each time it occurs |

Frequency | How often a piece of data occurs |

Stem-and-Leaf Plot | A system used to separate data into two numbers that are used to form a number |

Back-to-Back Stem-and-Leaf Plot | Used to compare two related sets of data |

Measures of Central Tendency | Numbers or pieces of data that can represent the whole set of data |

Probability | The ratio of the number of favorable outcomes for and event to the number of possible outcomes of the event. P(a)=number of favorable outcomes divided by total number of possible outcomes |

Simple Event | A single event |

Sample Space | The list of all possible outcomes |

Equally Likely | Outcomes for which the probability of each occurring is equal |

Odds | The ratio that compares the number of ways an even can occur (successes) to the number of ways the event cannot occur (failures) |

Created by:
abranch