![Algebra 1<br />8.5Exponential Growth Functions<br />Get ready:What do you think an exponential growth function is?<br />Get set:Evaluate when x = 5.<br />a)-12+9x b)-12+9x<br />What is the difference?<br />Go!<br />Exponential Growth<br />Something is growing __________________________ if it increases by the same ______________________ for each unit of time (i.e., year, month, second, etc.).<br />y=C(1+r)t<br />Example 1:You deposit $500 in an account that pays 8% annual interest compounded yearly.<br />--Compounded means that it adds 8% of what is in the account at the end of every year…so it adds more and more every year. That’s how exponential functions work.<br />What is the account balance after 6 years?<br />Example 2:A population of 20 rabbits is released into a wildlife region. The population triples each year for 5 years.<br />,[object Object]](https://image.slidesharecdn.com/a18-6exponentialfxns-110228160231-phpapp01/85/a186-exponential-fxns-notes-1-320.jpg)
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- 2. What is the population after 5 years?Graphing Exponential Functions<br />Make a ___________________ of values.<br />_______________ the points on graph.<br />Draw a ________________________________________ through the points.<br />Example 3:Graph the exponential growth model from Example 2.<br />time012345Population20<br /> <br />HW p. 480 (10 – 20 even)<br />