document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=509185>Question 509185</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Find the equation of a line passing through the pair of points. Write the equation in slope intercept form. The points are (2,1) and (10,-31) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #341315 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=341315\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Find the equation of a line passing through the pair of points. Write the equation in slope intercept form. The points are (2,1) and (10,-31)<BR>\n" );
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document.write( "The hard way:<BR>\n" );
document.write( "Find the slope, m = diffy/diffx = (-31-1)/(10-2) = -32/8<BR>\n" );
document.write( "m = -4<BR>\n" );
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document.write( "Use y = mx+b and either point to find b<BR>\n" );
document.write( "1 = -4*2 + b<BR>\n" );
document.write( "b = 9<BR>\n" );
document.write( "--> y = -4x + 9<BR>\n" );
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document.write( "Easier way:<BR>\n" );
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document.write( "|+x +y +1|<BR>\n" );
document.write( "|+2 +1 +1| = 0<BR>\n" );
document.write( "|10 -31 1|<BR>\n" );
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document.write( "x(1+31) - y(2-10) + (-62-10) = 0<BR>\n" );
document.write( "32x + 8y = 72<BR>\n" );
document.write( "4x + y = 9<BR>\n" );
document.write( "y = -4x + 9 </SPAN>\n" );
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