document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1178452>Question 1178452</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Find the slope of a line crossing (-1,2) and (-7,10). Then use it to write an equation for the line in slope- intercept form. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #807705 by </B><A HREF=/tutors/aboutme.mpl?userid=Cromlix><B>Cromlix(4381)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Cromlix><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=Cromlix><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=807705\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Hi there,<BR>\n" );
document.write( "Slope (gradient) = y2 - y1/x2 -x1 = 10 -2/-7-(-1)) = 8/-6 = -4/3<BR>\n" );
document.write( "Equation formula = y - b = m(x - a)   You can use either of the coordinate sets. (-1, 2) or (-7, 10). I will use (-1, 2)<BR>\n" );
document.write( "y - 2 = -4/3(x -(-1))= y - 2 = -4/3x -4/3 = y = -4/3x - 4/3 + 6/3<BR>\n" );
document.write( "Answer = y = -4/3x + 2/3  or you can multiply throughout by 3<BR>\n" );
document.write( "then answer = 3y = -4x + 2.<BR>\n" );
document.write( "Hope this helps :-) </SPAN>\n" );
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