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Which is an exponential decay function?

f(x)=3/4(7/4)^x
f(x)=2/3(4/5)^-x
f(x)=3/2(8/7)^-x
f(x)=1/3(-9/2)^x

User ELTA
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2 Answers

2 votes

Answer:

f(x)=3/2(8/7)^-x

Explanation:

If you turn the fractions into decimals (
(3)/(2)((8)/(7) )^-x = 1.5(1.14)^-x), put that number into y= in your graphing calculator and press graph you will be able to see, verses the other functions, that the line decreases.

User Legion
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4 votes

Answer: c

Explanation:

User Vinzius
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