document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=886376>Question 886376</A>: <I><SPAN STYLE=\"word-break: break-all;\"> write an equation in the form y = mx + b for the line which contains the points (-8,20) and (-4,0). </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #535901 by </B><A HREF=/tutors/aboutme.mpl?userid=rothauserc><B>rothauserc(4718)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=rothauserc><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=rothauserc><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=535901\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> In y = mx +b, m is the slope of the line<BR>\n" );
document.write( "m = (0 - 20) / (-4 - (-8)) = -20 / 4 = -5<BR>\n" );
document.write( "now we have y = -5x +b<BR>\n" );
document.write( "we calculate b by using one of the points, pick (-8, 20)<BR>\n" );
document.write( "20 = -5(-8) +b<BR>\n" );
document.write( "20 = 40 +b<BR>\n" );
document.write( "b = -20<BR>\n" );
document.write( "therefore the equation of this line is<BR>\n" );
document.write( "y = -5x -20<BR>\n" );
document.write( " </SPAN>\n" );
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