document.write( "Question 738236: if y varies directly with x, write the linear function if y=8 and x=4 \n" ); document.write( "
Algebra.Com's Answer #450735 by MathLover1(20850)\"\" \"About 
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if \"y\" varies directly with \"x\", then we have a linear function in the form \"y=kx\" \r
\n" ); document.write( "\n" ); document.write( " if \"y=8\" and \"x=4\", then we have\r
\n" ); document.write( "\n" ); document.write( "\"8=k%2A4\"\r
\n" ); document.write( "\n" ); document.write( "\"k=8%2F4\"\r
\n" ); document.write( "\n" ); document.write( "\"k=2\"\r
\n" ); document.write( "\n" ); document.write( "so, your function is: \"y=2x\"\r
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