document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=19192>Question 19192</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I have a problem that has (1,5) and (2,7) i have to figure out what the equation is for the 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 #9241 by </B><A HREF=/tutors/aboutme.mpl?userid=Earlsdon><B>Earlsdon(6294)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Earlsdon><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=9241\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Recall that the slope-intercept form of the equation for a line is:  y = mx+b where m is the slope and b is the y-intercept.\r<BR>\n" );
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document.write( "First, find the slope using the two given points:<BR>\n" );
document.write( " <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=m+=+%28y2-y1%29%2F%28x2-x1%29 ALIGN=MIDDLE  ALT=\"m+=+%28y2-y1%29%2F%28x2-x1%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(x1, y1) = (1, 5)<BR>\n" );
document.write( "(x2, y2) = (2, 7)\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=m+=+%287-5%29%2F%282-1%29 ALIGN=MIDDLE  ALT=\"m+=+%287-5%29%2F%282-1%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=m+=+2%2F1 ALIGN=MIDDLE  ALT=\"m+=+2%2F1\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=m+=+2 ALIGN=MIDDLE  ALT=\"m+=+2\"   DISABLED_style= \"max-width:90%; height:auto;\" > So now you can write: <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y+=+2x+%2B+b ALIGN=MIDDLE  ALT=\"y+=+2x+%2B+b\"   DISABLED_style= \"max-width:90%; height:auto;\" > but you need to find the value of b, the y-intercept.<BR>\n" );
document.write( "Use the x- and y-coordintes of any one of the two given points, substitute these into the above equation and solve for b. Using the first point (1, 5),\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=5+=+2%281%29+%2B+b ALIGN=MIDDLE  ALT=\"5+=+2%281%29+%2B+b\"   DISABLED_style= \"max-width:90%; height:auto;\" > Subtract 2 from both sides.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=3+=+b ALIGN=MIDDLE  ALT=\"3+=+b\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Now you can write the final equation:\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y+=+2x+%2B+3 ALIGN=MIDDLE  ALT=\"y+=+2x+%2B+3\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( " </SPAN>\n" );
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