document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=516783>Question 516783</A>: <I><SPAN STYLE=\"word-break: break-all;\"> i would like a deeper explination of point-slope form with a question like: write and equation of th line that passes through (1,-6) amd is perpendicular to the line y=3x+7 thank you verry much this is greatly appreciated </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #344499 by </B><A HREF=/tutors/aboutme.mpl?userid=oberobic><B>oberobic(2304)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=oberobic><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=344499\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A line in point-slope form:  y = mx +b<BR>\n" );
document.write( "m = slope<BR>\n" );
document.write( "b = y-intercept (0,b)<BR>\n" );
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document.write( "y = 3x+7<BR>\n" );
document.write( "slope =3<BR>\n" );
document.write( "y-intercept = (0,7)<BR>\n" );
document.write( "if x = -7/3, then y =0<BR>\n" );
document.write( "x-intercept = (-7/3, 0)<BR>\n" );
document.write( "with two points you draw a line<BR>\n" );
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document.write( "a perpendicular line has a slope = to the negative inverse of the first equation<BR>\n" );
document.write( "so the slope of the second equation will be -1/3<BR>\n" );
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document.write( "y = -(1/3)x + b<BR>\n" );
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document.write( "use the point you want it go through to find 'b'<BR>\n" );
document.write( "(x,y) = (1,-6)<BR>\n" );
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document.write( "-6 = -(1/3)(1) + b<BR>\n" );
document.write( "b = -6 + 1/3<BR>\n" );
document.write( "b = -18/3 +1/3<BR>\n" );
document.write( "b = -17/3<BR>\n" );
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document.write( "y = -(1/3)x -17/3<BR>\n" );
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document.write( "The following graphs the two lines.<BR>\n" );
document.write( "The red line is y =3x+7<BR>\n" );
document.write( "The green line is y = -(1/3)x -17/3<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+graph%28500%2C500%2C-10%2C10%2C-10%2C10%2C3%2Ax%2B7%2C-1%2F3%2Ax-17%2F3%29+ ALIGN=MIDDLE  ALT=\"+graph%28500%2C500%2C-10%2C10%2C-10%2C10%2C3%2Ax%2B7%2C-1%2F3%2Ax-17%2F3%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
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