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The number N of US cellular phone subscribers (in millions) is shown in the table. (Midyear...

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The number N of US cellular phone subscribers (in millions) is shown in the table. (Midyear estimates are given.)

Find the average rate of cell phone growth between the following years:

(a) from 1998 to 2004 (million phones/yr).

(b) from 2002 to 2004 (million phones/yr).

{eq}\begin{array}{|l|l|l|l|l|l|l|} \hline t & 1996 & 1998 & 2000 & 2002 & 2004 & 2006\\ \hline N & 44 & 69 & 109 & 141 & 182 & 233\\ \hline \end{array} {/eq}

Average Rate of Change

One way that we can calculate the rate of change of a function is by finding the average rate of change. This finds the ratio of the change in the function over the change in the function's input.

$$\frac{f(b) - f(a)}{b-a} $$

Answer and Explanation: 1

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a) In order to find the average rate of change in cell phone subscribers from 1998 to 2004, we need to find the ratio of the change of subscribers...

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Average Rate of Change: Definition, Formula & Examples

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Chapter 20 / Lesson 5
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Finding the average rate of change is similar to finding the slope of a line. Study the definition of average rate of change, its formula, and examples of this concept.


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