Single Variable Calculus, Chapter 3, 3.1, Section 3.1, Problem 41
The table below represents the estimated percentage $P$ of the population of cell phone users in Europe. $ \begin{array}{|c|c|c|c|c|c|} \hline \text{Year} & 1998 & 1999 & 2000 & 2001 & 2002 & 2003\\ \hline\\ P & 28 & 39 & 55 & 68 & 77 & 83\\ \hline \end{array} $ a.) Determine the average rate of cell phone growth on the following time frames $ \begin{equation} \begin{aligned} & (i) 1999 \text{ to } 2000 && (ii) 2000 \text{ to } 2001\\ & (iii) 2000 \text{ to } 2002 \end{aligned} \end{equation} $ b.) Estimate the instantaneous rate of growth in 2000 by taking the average of two average rates of change. c.) Estimate the instantaneous rate of growth in 2000 by measuring the slope of a tangent. a.) $(i)$ from 1999 to 2000 $\displaystyle \text{average rate} = \frac{P(2000)-P(1999)}{2000-1999} = \frac{55-39}{2000-1999} = 16 \frac{\%}{\text{year}}$ $(i...