document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=636050>Question 636050</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I need assistance writing slope-intercept form of a line between two given points. An example would be writing slope-intercept form of a line through points (1,-3) and (0,4.   </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #400688 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=400688\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> writing slope-intercept form of a line through points (1,-3) and (0,4).<BR>\n" );
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document.write( "Find the slope, m<BR>\n" );
document.write( "m = diffy/diffx = 7/(-1)<BR>\n" );
document.write( "m = -7<BR>\n" );
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document.write( "Use y = mx + b and either point to find b, the y-intercept<BR>\n" );
document.write( "-3 = -7*1 + b<BR>\n" );
document.write( "b = 4<BR>\n" );
document.write( "--> y = -7x + 4<BR>\n" );
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document.write( "If you know determinants:<BR>\n" );
document.write( "|x +y 1|<BR>\n" );
document.write( "|1 -3 1| = 0<BR>\n" );
document.write( "|0 +4 1|<BR>\n" );
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document.write( "(Plus signs for alignment)<BR>\n" );
document.write( "x*(-3 - 4) - y*(1 - 0) + 1*(4 - 0) = 0<BR>\n" );
document.write( "-7x - y + 4 = 0<BR>\n" );
document.write( "y = -7x + 4 </SPAN>\n" );
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