Question

find growth/decay percentage (level 1)
score: 4/5 penalty: 1 off
question
given the following exponential function, identify whether the change represents growth or decay, and determine the percentage rate of increase or decrease.
$y = 8600(0.11)^x$
answer attempt 1 out of 2
growth % increase submit answer

Explanation:

Step1: Identify growth/decay

Exponential form: $y = a(b)^x$. $b=0.11 < 1$, so decay.

Step2: Calculate decay percentage

Decay rate = $1 - b = 1 - 0.11 = 0.89 = 89\%$.

Step3: Final result

Change is decay with 89% decrease.

Answer:

Decay, 89% decrease