Exponential Equations


Exponential Growth

A population of rabbits doubles every year. If there were initially 8 rabbits, how many rabbits will there be after 5 years?

Write the exponential function. Is this an exponential growth or decay function? (Tip: If you need help getting started, make a table)

 Year  Rabbits
   
   
   
   
   


y=8(2)^x


Exponential Decay

There are 800 fish in a pond at the park. Due to over-fishing, the number of fish in the pond decreases by 5% each year from 2000 to 2004. Use a table to show how many fish are in the lake each year. If this trend continues, how many fish will there be in 2008? 

y=800(0.95)^x


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