1. ACT Class Opener: http://sbstjohn.com/QODWebSite/Trigonom/t rig_1213_f026.htm http://sbstjohn.com/QODWebSite/Trigonom/t rig_1213_f026.htm http://sbstjohn.com/QODWebSite/PreElemAl g/alg_1213_f023.htm http://sbstjohn.com/QODWebSite/PreElemAl g/alg_1213_f023.htm

2. Definition of Logarithmic Functions

3. Evaluating Logarithms

4. Student Check:

5. Common Logarithmic Functions The logarithmic function with base 10 is called the common logarithmic function. On most calculators, this function is denoted by LOG

6. Evaluating Common Logrithms

7. Properties of Logarithms

8. Using Properties of Logarithms

9. Sketching Graphs of Logarithms

10. Example: