1. Warm Up
L8-2
Obj: Identify the role of constants in y = abcx

2. L8-2 Obj: Identify the role of constants in y = abcx

3. Graph y = 3 • 2x and y = –3 • 2x. Label the asymptote of each graph.
Properties of Exponential Functions
LESSON 8-2
Additional Examples
Graph y = 3 • 2x and y = –3 • 2x. Label the asymptote of each graph.
x y = 3 · 2x y = –3 · 2x –3 –2 –1
0 3 –3
1 6 –6
2 12 –12
3 24 –24 3 8 4 1 2 –
Step 1: Make a table of values
Step 2: Graph each function.
y = 3 • 2x stretches y = 2x by a factor of 3.
y = –3 • 2x reflects y = 3 • 2x in the x-axis.

4. Graph y = and y = – 2. 1 2 x 1 2
x–3

5. Ex 3: Evaluate each expression to four decimal places
b. ℮4
c. ℮-2

6. Compound Interest Continually

8. Example: Find the amount of money you will have if you invest $8500 at 7.75% interest for 9 years compounded continuously

9. Obj 2: Students will use definition of log

11. Use definition of log and write in logarithmic form

13. Ex 2:
Evaluate log3 81.
L8-2(p 450)  #2, 12, 18-26e, 51,52,53,54-66e