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OpenStudy (anonymous):
Daily use of cigarettes by U.S. 12th graders is declining. In 1995, 21.6% of 12th graders smoked daily. This number decreased to 11.4% in 2008. Find the average rate of change in the percent of 12th graders who smoke from 1995 to 2008.
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OpenStudy (anonymous):
Average rate of change is \[ \frac{f(b)-f(a)}{b-a} = \frac{11.4\%-21.6\%}{2008-1995} \]
OpenStudy (anonymous):
@wio I got -.784 but would I round?
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