Rates of Change and Behavior of Graphs · Exercise 30

The table gives the annual sales (in millions of dollars) of a product from 1998 to 2006. What was the average rate of change of annual sales (a) between 2001 and 2002, and (b) between 2001 and 2004?

$$\begin{array}{cc}\text{Year}& \text{Sales (millions of dollars)}\\ \text{1998}& \text{201}\\ \text{1999}& \text{219}\\ \text{2000}& \text{233}\\ \text{2001}& \text{243}\\ \text{2002}& \text{249}\\ \text{2003}& \text{251}\\ \text{2004}& \text{249}\\ \text{2005}& \text{243}\\ \text{2006}& \text{233}\end{array}$$

Its source prints no answer for this problem, so there's nothing to check against.

OpenStax, Algebra and Trigonometry 2e · §3.3 Rates of Change and Behavior of Graphs · Exercise 30