Problem 43 of 7
Write an exponential model for initial value 75 and percent change 1.2% decrease per interval.
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build f(x)=a(1+r)^x or a(1-r)^x.
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Percent change must be constant over each interval.
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Solution
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1. Convert the percent change into a growth or decay factor.
2. Use the initial value as a.
3. Write f(x)=a(b)^x.
Use the worked steps, then substitute the final answer back into the original relationship to confirm it satisfies the prompt.
Additive linear models for percent-change contexts.