document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=419744>Question 419744</A>: <I><SPAN STYLE=\"word-break: break-all;\"> find the equation of a line through point(3,1) slope =-2 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #293449 by </B><A HREF=/tutors/aboutme.mpl?userid=duckness73><B>duckness73(47)</B></A><img src=\"/images/stars/stars-07.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=duckness73><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=duckness73><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=293449\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> There are many ways to solve this, but I think that I would use the \"slope intercept\" form of an equation, that is, y = mx + b.  From the information provided, you know the slope m (that's -2), you know x (that's 3) and you know y (that's 1).  So, you can figure out the intercept b.  You have:\r<BR>\n" );
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document.write( "y = mx + b<BR>\n" );
document.write( "1 = (-2)*3 + b<BR>\n" );
document.write( "1 = -6 + b<BR>\n" );
document.write( "7 = b\r<BR>\n" );
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document.write( "So, going back to the slope intercept form of the equation, you can make the substitutions for m and b:<BR>\n" );
document.write( "y = mx + b<BR>\n" );
document.write( "y = -2x + 7\r<BR>\n" );
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document.write( "Answer: y = -2x + 7 </SPAN>\n" );
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