1. More Logarithms Graphing and Inverses
Lesson 7.4B

2. Warm-up
a) Rewrite in exponential form. log93 = 1 2 b) Rewrite in log form. ey=8 c) Evaluate without a calculator. i) log216 ii) log 100 iii) ln 1

3. Recall how to find the inverse of a function
Find the inverse of y = 3x - 5

4. 1. Find the inverse of each function
y = log3x
y = 12x
y = ex-3
y = log (x – 5)

5. 2. Graph each function.
y = log2x
y = log3 (x + 2)
c) y = log5x + 3

6. 3. The wind speed s (in miles per hour) near the center of a tornado can be modeled by
s = 93 log d + 65
where d is the distance that the tornado travels.
In 1925 a tornado traveled 220 miles through 3 states. Estimate the wind speed.
If a tornado had a wind speed of 158 mph, estimate how far it might travel.