document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=239368>Question 239368</A>: <I><SPAN STYLE=\"word-break: break-all;\"> write the equation of a line in slope intercept form<BR>\n" );
document.write( "through points (-7,2) and (-6, -2) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #175746 by </B><A HREF=/tutors/aboutme.mpl?userid=nyc_function><B>nyc_function(2741)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=nyc_function><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=nyc_function><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=175746\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Your first step is to find the slope.\r<BR>\n" );
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document.write( "Let m = slope\r<BR>\n" );
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document.write( "m = difference of y coordinates divided by the difference of x coordinates\r<BR>\n" );
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document.write( "m = (-2 - 2)/(-6 -(-7))\r<BR>\n" );
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document.write( "m = -4/(-6 + 7)\r<BR>\n" );
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document.write( "m = -4/1\r<BR>\n" );
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document.write( "m = -4\r<BR>\n" );
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document.write( "The slope is -4.\r<BR>\n" );
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document.write( "To write in slope-intercept form, y = mx + b, we need to use the point-slope formula.\r<BR>\n" );
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document.write( "y - y1 = m(x - x1) is the point-slope formula.\r<BR>\n" );
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document.write( "We use one of the given points and the slope to find our equation.\r<BR>\n" );
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document.write( "I will use (-7, 2) but you can use the other point if you want to.\r<BR>\n" );
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document.write( "We plug the slope and one point into the point-slope formula and solve for y.\r<BR>\n" );
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document.write( "y - 2 = -4(x -(-7))\r<BR>\n" );
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document.write( "y - 2 = -4(x + 7)\r<BR>\n" );
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document.write( "y - 2 = -4x - 28\r<BR>\n" );
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document.write( "y = -4x - 28 + 2\r<BR>\n" );
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document.write( "y = -4x - 26\r<BR>\n" );
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document.write( "Did you follow?\r<BR>\n" );
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document.write( " </SPAN>\n" );
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