1. Skill 15: Converting Between Exponential and Logarithmic Forms Have SAT Practice Set 3 out on your desk.

2. Revisiting Exponents

5. You Try:

6. Why use a logarithm? Sound scales (decibels) Earthquake measurements (Richter scale) Musical scales pH measurements

7. Discovering Logarithms

8. What is a logarithm? A logarithm is another way of describing the exponent in an equation.

9. Converting Equations Between Logarithmic and Exponential Forms

11. You Try: On Your Whiteboard 1.Write in logarithmic form: 2.Write in exponential form:

12. Evaluating a Logarithmic Expression

14. You Try:

15. Solving Simple Logarithmic Equations

17. You Try:

18. Logarithm “War” Expectations – On-task – Stuck? Ask your partner, then ask me by raising your hand.

19. Exit Quiz