document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=390372>Question 390372</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 13 - 51<BR>\n" );
document.write( "15 - 49<BR>\n" );
document.write( "22 - 42<BR>\n" );
document.write( "33 - 31<BR>\n" );
document.write( "36 - 28\r<BR>\n" );
document.write( "\n" );
document.write( "Input / output .. I need the Rule here thanks I am stuck<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #276775 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=276775\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 13 - 51<BR>\n" );
document.write( "15 - 49<BR>\n" );
document.write( "22 - 42<BR>\n" );
document.write( "33 - 31<BR>\n" );
document.write( "36 - 28 <BR>\n" );
document.write( "Input / output .. I need the Rule here thanks <BR>\n" );
document.write( "----------------<BR>\n" );
document.write( "The relation is linear.<BR>\n" );
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document.write( "Use two of the pairs to find the slope:<BR>\n" );
document.write( "m = (49-51)/(15-13) = -1<BR>\n" );
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document.write( "Form: y = mx + b<BR>\n" );
document.write( "Substitute for y,x and m, then solve for \"b\":<BR>\n" );
document.write( "51 = -1(13)+b<BR>\n" );
document.write( "b = 64<BR>\n" );
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document.write( "Equation:<BR>\n" );
document.write( "y = -x+64<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );