SOLUTION: Which function describes exponential decay? a) f(x)=6(1.01)^x b) f(x)=3.4(40)^2x c) f(x)=25(0.8)^x d) f(x)=8(17)^x/4

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Question 1090743: Which function describes exponential decay?
a) f(x)=6(1.01)^x
b) f(x)=3.4(40)^2x
c) f(x)=25(0.8)^x
d) f(x)=8(17)^x/4

Answer by MathLover1(20850)   (Show Source): You can put this solution on YOUR website!
In the exponential function , if , the output gets smaller as gets larger. In this case, is called an exponential decay function.
let see what is in your case:
a) -> and ; unction is an exponential growth
b) -> and ; unction is an exponential growth
c) -> and ; unction is an exponential
d)-> and ; unction is an exponential growth

so, your answer is:
c) -> and ; unction is an exponential

see its graph:



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