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# Unit 1: Review Alg 2

### Vocabulary terms for sections 1-1, 1-2, 1-3, 1-4, 2-1, 2-2, and 2-4

Term | Definition |
---|---|

Opposite | The additive inverse of any number a is -a. |

Additive Inverse | The opposite of any number a is -a. |

Reciprocal | The multiplicative inverse of any nonzero number a is 1/a. |

Multiplicative Inverse | The reciprocal of any nonzero number a is 1/a. |

Absolute Value | The distance from zero on the number line. |

Variable | A symbol, usually a letter, that represents one of more numbers. |

Expression | Combination of one or more variables. |

Evaluate | Substitute numbers for variables in an expression and follow the order of operations. |

Term | A number, variable, or the product of a number and one or more variables. |

Coefficient | The numerical factor in a term. |

Solution of an equation | A number that makes an equation true. |

Compound Inequality | A pair of inequalities joined by "and" or "or". |

Relation | A set of pairs of input and output values. |

Domain | The set of all inputs, or x-coordinates of ordered pairs. |

Range | The set of all outputs, or y-coordinates of ordered pairs. |

Mapping Diagram | Links the elements of the domain with corresponding elements of the range. |

Function | A relation in which each element of the domain is paired with exactly one element in the range. |

Linear Function | A function whose graph is a line. |

Dependent Variable | y variable |

Independent Variable | x variable |

y-intercept | Point at which the line crosses the y-axis. |

x-intercept | Point at which the line crosses the x-axis. |

Standard form of a linear equation | Ax + By = C |

Slope | The ratio of the vertical change to a corresponding horizontal change. Rise over run. |

Point-slope form | y – y1 = m(x – x1) |

Slope-intercept form | y = mx + b |

Created by:
SHSMath