1. Log Introduction  Video  **** find*****

2. 8.3 Lesson Logarithmic Functions

3. objectives:  Students will learn how to write and evaluate logarithmic expressions. Students will make a correlation between mathematics and science with respect to concentrations, pH and Richter Scale.  Teacher will show students how to use technology to graph their written logarithmic expression. Teacher will show students how to relate the Richter Scale of 10 increments and pH scale of the same increments.

4. Logarithmic Form Y = b log y = x 25 = 5log 25 = 2 X b 2 5 Logarithmic Form ex 729 = 3 Logarithmic Form 6 Exponential Form

5. your turn … Exponential Form Logarithmic Form Log 256 = 4 9 = 81 Log 32 = 5 Log 10 = 1 8 = 1818 2 4 2

6. Evaluating Logarithms log 16 Log 16 = x 8 x 16 = 8 8 Write an equation in Logarithmic form Convert to Exponential form Write each side using base 2 Power Property of Exponents Set the exponents equal to each other 2 = 2 4 = 3x 4 3 x3 x Solve for X= X 4343

7. Evaluate Logarithms Log 16 = x Log 49 7 16 = 8 8 x

8. your turn… Log 2 2 -5 Log 1 32 64 Log -25 5 Log y b Y = b X

9. technology  Start over ppt over, using calculators  Pass out packet and begin