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## Why Is Listeria So Dangerous? |
Why do we refrigerate food? To keep bacteria from ruining the food. Refrigeration slows down bacterial growth, allowing us to keep food in our homes for a longer time. But what happens when bacteria continue to grow even in a refrigerator? This is one reason why the bacterium known as listeria is so dangerous: It continues to grow even when refrigerated. In this module, we study exponential growth models for bacteria. We look at piecewise functions that show bacterial growth before and after refrigeration. Students will explore time-dependent bacterial growth functions. They will analyze data in tables and in graphs. They'll use the Desmos graphing calculator to explore the properties of exponential functions. |
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## Closed Captioned Video: Quadratics: What Is a Quadratic Function? |
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Video Tutorial: Quadratics: What Is a Quadratic Function? In this video, students learn about the characteristics of quadratic functions by looking at data, graphs, and equations. This video works with quadratic functions in standard form. A Video Transcript is available for this tutorial at this Note: The download is Media4Math's guide to closed captioned videos. ## Other Closed Captioned Videos## To see the complete collection of Closed Captioned Videos, click on this
Link |
Graphs of Quadratic Functions, Quadratic Equations and Functions | |

## Definition--Functions and Relations Concepts--Absolute Value Function |
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This is a collection of definitions related to the topic of functions and relatinos. This includes general definitions for functions and relations, as well as terms related to types of functions, visualization models, other related terms. Note: The download is a PNG file. ## Related Resources## To see the complete collection of Math Definitions on this topic, click on this
Link. |
Relations and Functions | |

## Definition--Functions and Relations Concepts--Composite Function |
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This is a collection of definitions related to the topic of functions and relatinos. This includes general definitions for functions and relations, as well as terms related to types of functions, visualization models, other related terms. Note: The download is a PNG file. ## Related Resources## To see the complete collection of Math Definitions on this topic, click on this
Link. |
Relations and Functions | |

## Definition--Functions and Relations Concepts--Conic Sections |
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This is a collection of definitions related to the topic of functions and relatinos. This includes general definitions for functions and relations, as well as terms related to types of functions, visualization models, other related terms. Note: The download is a PNG file. ## Related Resources## To see the complete collection of Math Definitions on this topic, click on this
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Relations and Functions | |

## Definition--Functions and Relations Concepts--Constant Function |
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Relations and Functions | |

## Definition--Functions and Relations Concepts--Continuous Function |
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Note: The download is a PNG file. ## Related Resources## To see the complete collection of Math Definitions on this topic, click on this
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Relations and Functions | |

## Definition--Functions and Relations Concepts--Decreasing Function |
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Note: The download is a PNG file. ## Related Resources## To see the complete collection of Math Definitions on this topic, click on this
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Relations and Functions | |

## Definition--Functions and Relations Concepts--Dependent Variable |
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Note: The download is a PNG file. ## Related Resources## To see the complete collection of Math Definitions on this topic, click on this
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Relations and Functions | |

## Definition--Functions and Relations Concepts--Discontinuous Function |
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Note: The download is a PNG file. ## Related Resources## To see the complete collection of Math Definitions on this topic, click on this
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Relations and Functions | |

## Definition--Functions and Relations Concepts--Discrete Functions |
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Note: The download is a PNG file. ## Related Resources## To see the complete collection of Math Definitions on this topic, click on this
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Relations and Functions | |

## Definition--Functions and Relations Concepts--Distorting a Function Horizontally |
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Note: The download is a PNG file. ## Related Resources## To see the complete collection of Math Definitions on this topic, click on this
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Relations and Functions | |

## Definition--Functions and Relations Concepts--Distorting a Function Vertically |
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Note: The download is a PNG file. ## Related Resources## To see the complete collection of Math Definitions on this topic, click on this
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Relations and Functions | |

## Definition--Functions and Relations Concepts--Domain of a Function |
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Note: The download is a PNG file. ## Related Resources## To see the complete collection of Math Definitions on this topic, click on this
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Relations and Functions | |

## Definition--Functions and Relations Concepts--Even Function |
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Relations and Functions | |

## Definition--Functions and Relations Concepts--Function |
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Note: The download is a PNG file. ## Related Resources## To see the complete collection of Math Definitions on this topic, click on this
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Relations and Functions | |

## Definition--Functions and Relations Concepts--Function Machine |
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Relations and Functions | |

## Definition--Functions and Relations Concepts--Function Notation |
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Relations and Functions | |

## Definition--Functions and Relations Concepts--Function Table |
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Relations and Functions | |

## Definition--Functions and Relations Concepts--Graphs of Functions |
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Relations and Functions | |

## Definition--Functions and Relations Concepts--Graphs of Relations |
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Relations and Functions | |

## Definition--Functions and Relations Concepts--Increasing Function |
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Note: The download is a PNG file. ## Related Resources## To see the complete collection of Math Definitions on this topic, click on this
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Relations and Functions | |

## Definition--Functions and Relations Concepts--Independent Variable |
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Note: The download is a PNG file. ## Related Resources## To see the complete collection of Math Definitions on this topic, click on this
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Relations and Functions | |

## Definition--Functions and Relations Concepts--Inverse Function |
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Note: The download is a PNG file. ## Related Resources## To see the complete collection of Math Definitions on this topic, click on this
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Relations and Functions | |

## Definition--Functions and Relations Concepts--Odd Function |
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Note: The download is a PNG file. ## Related Resources## To see the complete collection of Math Definitions on this topic, click on this
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Relations and Functions |