document.write( "Question 976202: Is C=(pi)d a model of direct variation if C is circumference and d is diameter? The question asks if circumference and diameter are related through that equation \n" ); document.write( "
Algebra.Com's Answer #597835 by Alan3354(69443)\"\" \"About 
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C and d are directly related.
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\n" ); document.write( "C increases when d increases.
\n" ); document.write( "2 times d --> 2 times C.
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