document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=272649>Question 272649</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please help me...I have to find the slope of the pair (-9,-9) and (7,-9)...I came up with 0/16...what is the slope?  Please show me how?...Thank you I look forward to hearing from you. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #199377 by </B><A HREF=/tutors/aboutme.mpl?userid=Theo><B>Theo(13342)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Theo><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=Theo><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=199377\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> your point pairs are:\r<BR>\n" );
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document.write( "(x1,y1) = (-9,-9)\r<BR>\n" );
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document.write( "(x2,y2) = (7,-9)\r<BR>\n" );
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document.write( "the slope is the change in the value of y divided by the change in the value of x.\r<BR>\n" );
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document.write( "the change in the value of y is y2 - y1 = (-9) - (-9) = (-9) + 9 = 0.\r<BR>\n" );
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document.write( "the change in the value of x is x2 - x1 = (7) - (-9) = (7) + (9) = 16\r<BR>\n" );
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document.write( "your slope is 0/16 = 0\r<BR>\n" );
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document.write( "I believe you have the right answer.\r<BR>\n" );
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document.write( "the slope intercept form of the equation of a straight line is:\r<BR>\n" );
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document.write( "y = mx + b\r<BR>\n" );
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document.write( "where m is the slope and b is the y intercept.\r<BR>\n" );
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document.write( "since the slope is 0, we can use either one of the 2 points to find the equation.\r<BR>\n" );
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document.write( "let's use the point (x1,y1) = (-9,-9)\r<BR>\n" );
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document.write( "since the slope is equal to 0, your equation becomes:\r<BR>\n" );
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document.write( "y = 0x + b\r<BR>\n" );
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document.write( "we let y = -9 and x = -9 to get:\r<BR>\n" );
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document.write( "-9 = 0*(-9) + b\r<BR>\n" );
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document.write( "this becomes:\r<BR>\n" );
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document.write( "-9 = b\r<BR>\n" );
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document.write( "since b is the y intercept, your equation becomes:\r<BR>\n" );
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document.write( "y = 0x - 9 which is the same as:\r<BR>\n" );
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document.write( "y = -9\r<BR>\n" );
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document.write( "graph of your equation looks like this:\r<BR>\n" );
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document.write( "what you have is a horizontal line at y = -9\r<BR>\n" );
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document.write( "if this is the equation of your line, then both points must be on that line.\r<BR>\n" );
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document.write( "your first point is (x1,y1) = (-9,-9).\r<BR>\n" );
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document.write( "look on the graph and you can see that when x = -9, y = -9.\r<BR>\n" );
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document.write( "your second point is (x2,y2) = (7,-9)\r<BR>\n" );
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document.write( "look on the graph and you can see that when x = 7, y = -9\r<BR>\n" );
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document.write( "in fact, x can be any value and y will be equal to -9.\r<BR>\n" );
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document.write( "you had it right.\r<BR>\n" );
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document.write( " </SPAN>\n" );
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