document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1098795>Question 1098795</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Find the variation constant and an equation of variation in which y varies directly as x, and y = 20 when x = 40. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #713175 by </B><A HREF=/tutors/aboutme.mpl?userid=greenestamps><B>greenestamps(13200)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=greenestamps><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=greenestamps><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=713175\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <br>Direct variation means the \"output\" function value gets larger or smaller as the input value gets larger or smaller.  This is represented by an equation of the form <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y+=+kx ALIGN=MIDDLE  ALT=\"y+=+kx\"   DISABLED_style= \"max-width:90%; height:auto;\" >, where k is the variation constant.<br><BR>\n" );
document.write( "If, as in this problem, you are given an x and a y value in a direct variation problem, you can find the variation constant k by plugging the given x and y values in the general form of the equation.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=20+=+k%2840%29 ALIGN=MIDDLE  ALT=\"20+=+k%2840%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=0.5+=+k ALIGN=MIDDLE  ALT=\"0.5+=+k\"   DISABLED_style= \"max-width:90%; height:auto;\" ><br><BR>\n" );
document.write( "The variation constant is 0.5, or 1/2. </SPAN>\n" );
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