document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=71910>Question 71910</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Can u help with variation?<BR>\n" );
document.write( "Describe the combined variation that is modeled by each formula.<BR>\n" );
document.write( "V = Bh÷3<BR>\n" );
document.write( "V = <pi>(r^2)h<BR>\n" );
document.write( "h = V÷<pi>(r^2) \r<BR>\n" );
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document.write( "------------\r<BR>\n" );
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document.write( "Write the funtion that models each variation. Find z when x = 4 and y = 9.<BR>\n" );
document.write( "z varies directly with x and inversely with y. When x = 6 and y = 2, z = 15.<BR>\n" );
document.write( "z varies jointly with x and y. When x = 2 and y = 3, z = 60<BR>\n" );
document.write( "z varies directly with the square of x and inversely with y. When x = 2 and y = 4, z = 3.<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #51403 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=51403\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Describe the combined variation that is modeled by each formula.<BR>\n" );
document.write( "V = Bh÷3<BR>\n" );
document.write( "V varies directly with B; V varies directly with h; B and h vary inversely<BR>\n" );
document.write( "----------------<BR>\n" );
document.write( "V = (r^2)h<BR>\n" );
document.write( "V varies directly with r^2; V varies directly with h; r^2 and h vary inversely<BR>\n" );
document.write( "------------<BR>\n" );
document.write( "h = V÷(r^2) <BR>\n" );
document.write( "h varies directly with V; h varies inversely with r^2; V and r^2 vary directly<BR>\n" );
document.write( "------------ <BR>\n" );
document.write( "Write the funtion that models each variation.<BR>\n" );
document.write( "Find z when x = 4 and y = 9.<BR>\n" );
document.write( "z varies directly with x and inversely with y.\r<BR>\n" );
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document.write( "z = kx/y ; z = (4/9)k  (k is the constant of variation)<BR>\n" );
document.write( "---------------<BR>\n" );
document.write( "When x = 6 and y = 2, z = 15.<BR>\n" );
document.write( "z varies jointly with x and y.<BR>\n" );
document.write( "z = kxy<BR>\n" );
document.write( "15 = (6*2)k<BR>\n" );
document.write( "15 = 12k<BR>\n" );
document.write( "k=5/4<BR>\n" );
document.write( "-------------\r<BR>\n" );
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document.write( " When x = 2 and y = 3, z = 60<BR>\n" );
document.write( "z varies directly with the square of x and inversely with y.<BR>\n" );
document.write( "z = kx^2/y<BR>\n" );
document.write( "60 = k(4/3)<BR>\n" );
document.write( "k=45<BR>\n" );
document.write( "--------------<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.\r<BR>\n" );
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document.write( " When x = 2 and y = 4, z = 3.<BR>\n" );
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