1. State the domain and range of each function

2. 8.1 8.2 Exponential Growth and Decay

3. Exponential Function Notice that now the variable is the exponent. Where base (b), b > 0, b  1, and x is any real number.

4. Graphs of Exponential Equations To see the basic shape of an exponential function such as make a table of values and plot points.

5. xy -2 0 1 2 3 1 2 4 8 Graph f(x) = 2 x

6. Notice the end behavior of the graph. As x → + ∞, f(x) → +∞, which means that the graph moves up to the right. As x → - ∞, f(x) → 0, which means that the graph has the line y=0 as an asymptote. An asymptote is a line that a graph approaches (gets close to) as you move away from the origin.

9. Exponential Growth Function: The graph passes through the point (0,a) [the y-intercept]. Have these characteristics… Where a > 0 and b > 1 The x-axis is an asymptote of the graph. The domain is all real numbers. The range is y > 0 if a > 0

10. Identify the y-intercept and asymptote State the domain and range

12. What do you think would happen to the shift of the graph? h determines the horizontal shift k determines the vertical shift

13. Domain: All Real Numbers Range: All Positive Real Numbers Domain: All Real Numbers Range: All Positive Real Numbers Asymptote: y = 0

14. Domain: All Real Numbers Range: All Positive Real Numbers Domain: All Real Numbers Range: y > -3 Asymptote: y = -3 Asymptote: y = 0

15. Domain: All Real Numbers Range: y > 2 Domain: All Real Numbers Range: y > 1 Asymptote: y = 2 Asymptote: y = 1

16. Exponential Decay Function Where a > 0, base b is 0 < b < 1 (b is a fraction), and x is any real number.

17. Decide whether f(x) is an exponential growth or exponential decay function. Because 0 < b < 1 f is an exponential decay function Because b > 1 f is an exponential growth function 1) 2) 3) Rewrite the function with positive exponent Because 0 < b < 1 f is an exponential decay function

18. Graphs of Exponential Equations To see the basic shape of an exponential function such as make a table of values and plot points.

19. xy -2 0 1 2 2 1 ½ ¼ Graph f(x) = (½) x -3

20. Notice the end behavior of the graph. As x → - ∞, f(x) → +∞, which means that the graph moves up to the left. As x → + ∞, f(x) → 0, which means that the graph has the line y = 0 as an asymptote.

21. State the domain, range, make a table of values and graph the following

22. Homework: Page 415 #28-38 even Page 423 #24-38 even