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# 1. Functions

### chapter 1

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

What is a variable? | a symobol that can be replaced by any member of a set of numbers or objects. |

What is an algebraic expression? | the result of the number and variables combined. |

What is an algebraic sentence? | consists of expressions related with verbs. |

What is a function? | a correspondence or pairing between two variables such that each value of the independent variable corresponds to exactly one value of the dependent variable. |

what are natural numbers? | counting numbers- {1,2,3,4,5...} |

What are whole numbers? | {0,1,2,3,4,5...} |

What are integers? | {-3,-2,-1,0,1,2,3...} |

What are rational numbers? | where a and b are integers and b does not =0 |

What are real numbers? | can be represented by decimals. |

f(x) notation reads..? | f of x |

Theorem (vertical-line test for functions) is.. | No vertical line intersects the graph of a function in more than one point. |

What is the distributive property for all real numbers? | c(a+b ) = ca+cb |

What is the opposite of a sum theorem? | -(a+b) = -a+-b |

Created by:
shelbyq