document.write( "Question 696078: If y varies directly as x, and y = 7 when x =5, find y when x =10
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Algebra.Com's Answer #428771 by Alan3354(69443)\"\" \"About 
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If y varies directly as x, and y = 7 when x =5, find y when x =10
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\n" ); document.write( "y = k*x
\n" ); document.write( "7 = k*5
\n" ); document.write( "k = 7/5 = 1.4
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\n" ); document.write( "@ x = 10:
\n" ); document.write( "y = 1.4*10
\n" ); document.write( "y = 14
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\n" ); document.write( "Or using proportions:
\n" ); document.write( "y = k*x
\n" ); document.write( "y/x = k (a constant)
\n" ); document.write( "7/5 = k = y/10
\n" ); document.write( "7/5 = y/10
\n" ); document.write( "5y = 70
\n" ); document.write( "y = 14\r
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