document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1190728>Question 1190728</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Find the variation constant and an equation of variation if y varies directly as x and the following conditions apply.\r<BR>\n" );
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document.write( "y=90 when x=1/9 </SPAN>\n" );
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document.write( "y varies directly as x means<BR>\n" );
document.write( "y = kx<BR>\n" );
document.write( "for some fixed constant k\r<BR>\n" );
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document.write( "y = 90 when x = 1/9<BR>\n" );
document.write( "Use that to find k<BR>\n" );
document.write( "y = kx<BR>\n" );
document.write( "90 = k(1/9)<BR>\n" );
document.write( "90*9 = k<BR>\n" );
document.write( "810 = k<BR>\n" );
document.write( "k = 810\r<BR>\n" );
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document.write( "The variation constant is 810<BR>\n" );
document.write( "The equation is y = 810x<BR>\n" );
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