## Introduction

What is a logarithm? The answer is more simple than meets the eye. Essentially, a logarithm is the “backwards” version of an exponent and we will explore it that way. For many reasons we’ll discuss on class, there is a variety of connections between logarithms and exponential functions. Find some helpful videos below to build meaning around what a logarithm is, the properties it holds and how to use them to solve exponent problems.

## Standards

F.BF.B.4 | Find the inverse functions. |

F.BF.B.5 | Understand the inverse relationship between exponents and logarithms and use this relationship to solve problem involving logarithms and exponents. |

F.IF.C.7.e | Graph exponential and logarithmic functions, showing intercepts and end behavior. |

F.LE.A.4 | For exponential models, express as a logarithm the solution to abct= d where a,c, and d are numbers and the base b is 2, 10 or e; evaluate the logarithm using technology. |

## Additional Support Lessons

- WhatPower (ENY Lesson 8) –> Relating to Exponential Functions
- WhatPower (ENY Lesson 10) –> Connecting to Logarithms (What is a Log?)
- Introduction to Logarithmic Properties (ENY Lesson 11)
- More Logarithmic Properties & Practice (ENY Lesson 12)