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990123
990123 990123
  • 20-07-2016
  • Mathematics
Answered

Without graphing, predict whether the function, y = 3(0.2)x, shows exponential growth or decay. Justify your predictions.

Adecay; because 0.2 < 1
Bgrowth; because 0.2 < 1
Cdecay; because 0.2 > 1
Dgrowth; because 0.2 > 1

Verified Answer :

caylus
caylus caylus
  • 20-07-2016

Hello,

Answer A

Let's choice x and x+1

x<x+1
==>
y1=30.2^x

y2=30.2^(x+1)

y2/y1=30.2^(x+1)/(30.2^x)=0.2

y2=0.2y1<1y1
The function shows a decay.



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