APFIVE Exponential Growth Model Interpretation
The exponential model $$y = 12.5(1.18)^x$$ represents the average daily cell phone usage in hours, where $$x$$ is the number of years since 2010. What does the base, 1.18, indicate about the growth pattern?
A
1.18 hours added yearly
B
Growth factor of 118%
C
Usage doubles every 1.18 years
D
18% annual increase
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