document.write( "Question 120554: If y varies directly with x and y = 36 when x = 6, find the constant of variation k. \n" ); document.write( "
Algebra.Com's Answer #88392 by nabla(475)\"\" \"About 
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When two variables vary directly, it means they vary by a constant
\n" ); document.write( "ratio.\r
\n" ); document.write( "\n" ); document.write( "That is,
\n" ); document.write( "\"y+=+k+x+\"\r
\n" ); document.write( "\n" ); document.write( "where k is the constant ratio above.\r
\n" ); document.write( "\n" ); document.write( "The ratio, k, is found by solving for it :\r
\n" ); document.write( "\n" ); document.write( "\"k+=+y%2Fx\"\r
\n" ); document.write( "\n" ); document.write( "Then, given the two values supplied:\r
\n" ); document.write( "\n" ); document.write( "\"y+=+36\", \"x+=+6%2C\"\r
\n" ); document.write( "\n" ); document.write( "\"k+=+36%2F6+=+6\"
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