document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=934263>Question 934263</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 1)Does y vary directly, inversely or neither with x? If so, write the equation for the variation. (It's a chart but I'll type them for x and y) <BR>\n" );
document.write( "x - -2, 3, 8 <BR>\n" );
document.write( "y- -2.8, 4.2, 11.2 \r<BR>\n" );
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document.write( "2)Does y vary directly, inversely or neither with x? If so, write the equation for the variation. <BR>\n" );
document.write( "x- 4, 5, 11 <BR>\n" );
document.write( "y- 3, 4.5, 13.5.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #568638 by </B><A HREF=/tutors/aboutme.mpl?userid=Theo><B>Theo(13342)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Theo><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=Theo><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=568638\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> if they vary directly, then k = y/x<BR>\n" );
document.write( "if they very inversely, then k = y*x\r<BR>\n" );
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document.write( "this is because the equation for direct variation is y = k*x<BR>\n" );
document.write( "solve for k and you get k = y/x\r<BR>\n" );
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document.write( "the equation for inverse variation is y = k/x<BR>\n" );
document.write( "solve for k and you get k = y*x\r<BR>\n" );
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document.write( "k has to be the same for all of the pairs, not just some of them.\r<BR>\n" );
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document.write( "your first series is:\r<BR>\n" );
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document.write( "x = -2, 3, 8<BR>\n" );
document.write( "y = -2.8, 4.2, 11.2 \r<BR>\n" );
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document.write( "we'll look for direct variation first.\r<BR>\n" );
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document.write( "-2.8 / -2 = 1.4<BR>\n" );
document.write( "4.2 / 3 = 1.4<BR>\n" );
document.write( "11.2 / 8 = 1.4\r<BR>\n" );
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document.write( "it's a direct variation equation.\r<BR>\n" );
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document.write( "your second series is:\r<BR>\n" );
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document.write( "x = 4, 5, 11<BR>\n" );
document.write( "y = 3, 4.5, 13.5. \r<BR>\n" );
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document.write( "we'll look for direct variation first.\r<BR>\n" );
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document.write( "3/4 = .75<BR>\n" );
document.write( "4.5 / 5 = .9\r<BR>\n" );
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document.write( "it's not a direct variation.\r<BR>\n" );
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document.write( "let's look for inverse.\r<BR>\n" );
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document.write( "3 * 4 = 12<BR>\n" );
document.write( "4.5 * 5 = 22.5\r<BR>\n" );
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document.write( "it's not an inverse variation.\r<BR>\n" );
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document.write( "this one is neither.\r<BR>\n" );
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document.write( " </SPAN>\n" );
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