document.write( "Question 934487: The cost of a stamp was 15 cents in 1980 and is 49 cents today, find the rate of change. \n" ); document.write( "
Algebra.Com's Answer #567503 by Alan3354(69443)\"\" \"About 
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Divide the change in price by the # of years.
\n" ); document.write( "--> average change/year
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