document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=43077>Question 43077</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Can anyone help with this?\r<BR>\n" );
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document.write( "A line passes through the point (-4,-9)  and has a slope of -3 . Write an equation for this line in x,y  -coordinates. <BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #28102 by </B><A HREF=/tutors/aboutme.mpl?userid=prabhjyot><B>prabhjyot(165)</B></A><img src=\"/images/stars/stars-09.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=prabhjyot><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=28102\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Given slope m=-3<BR>\n" );
document.write( "(x,y)=(-4,-9)<BR>\n" );
document.write( " In the slope-intercept form of a straight line, we have y, m, x, and b. So the only thing we don't have a value for is b (which gives  the y-intercept). Then all we need to do is plug in my slope and the x and y from this particular point, and then solve for b:\r<BR>\n" );
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document.write( "y = mx + b\r<BR>\n" );
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document.write( "-9=-3(-4)+b<BR>\n" );
document.write( "-9=12+b<BR>\n" );
document.write( "b=-21<BR>\n" );
document.write( "Then the line equation must be y= -3x-21  <BR>\n" );
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