**FILE** | **DESCRIPTION** | **PROPERTIES** |

AIDS | The total number of cases of AIDS in the USA in 4 month intervals from 1982. | Increasing, Concave Up |

BOMBAY | The total number of deaths in Bombay from a plague spread by rats during the period December 1905 to July 1906. | Increasing, Sigmoidal |

BOSTON | The population density of Boston in 1940 as a function of the distance from the city center. | Decreasing, Concave Up |

BOTSWANA | The population of Botswana from 1975 to 1990. | Increasing, Concave Up |

DOVES | The population of the collared dove as it spread throughout Britain from 1955 to 1964. | Increasing, Concave Up |

HOUSTON | The population of Houston from 1850 to 1980. | Increasing, Concave Up |

IRELAND | The population of Ireland from 1780 to 1920. | Increasing, Decreasing, Concave Up |

KENYA | The population of Kenya for the period 1955 to 1990 in 5 year intervals. | Increasing, Concave Up |

NICOTINE | Nicotine Sulphate is introduced into a closed room containing mosquitoes to determine how efficiently the chemical kills the insects. This shows the killing efficiency - the proportion of dead mosquitoes - for various doses. | Increasing, Sigmoidal |

PLAGUE | Total number of deaths by the week from August 1665 to October 1665 during the Great Plague of London. | Increasing, Sigmoidal |

RATS | In this experiment 144 seven month old rats were observed over a period of 30 months. The total number that died was recorded every month | Increasing, Sigmoidal |

USAPOP | The population of the USA from 1790 to 1990 in 10 year intervals. | Increasing, Concave Up |

WORLDPOP | The world population from 1650 to 1990. | Increasing, Concave Up |