document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=175286>Question 175286</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/9780470106716/algebrahomeworkh></A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> What's the equation of a line that passes through points (0,-1) and (2, 3 )? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #130370 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=130370\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> What's the equation of a line that passes through points (0,-1) and (2, 3 )?<BR>\n" );
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document.write( "The easiest way to do these is using determinants.<BR>\n" );
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document.write( "|x y 1|<BR>\n" );
document.write( "|0 -1 1| = 0<BR>\n" );
document.write( "|2,3 1|<BR>\n" );
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document.write( "x*(-1-3) - y*(0-2) + 0+2 = 0<BR>\n" );
document.write( "-4x + 2y = -2<BR>\n" );
document.write( "2x - y = 1<BR>\n" );
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document.write( "Both points fit. </SPAN>\n" );
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