document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=942419>Question 942419</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Which of the following is a line which is perpendicular to the line 3x+7y+2=0?\r<BR>\n" );
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document.write( "The answer is 7x-3y+5=0\r<BR>\n" );
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document.write( "this is how I solve the problem. \r<BR>\n" );
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document.write( "3x+7y+2=0<BR>\n" );
document.write( "y=-2/7-3x/7\r<BR>\n" );
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document.write( "-1/m= -1/-3/7=7/3\r<BR>\n" );
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document.write( "7/3= slope\r<BR>\n" );
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document.write( "y-y0=m (x-x0)<BR>\n" );
document.write( "y=7/3(x-0)\r<BR>\n" );
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document.write( "y=7/3\r<BR>\n" );
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document.write( "bx+ay=0\r<BR>\n" );
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document.write( "7x+3y=0\r<BR>\n" );
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document.write( "Where did they get 7x-3y +5=0? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #574516 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=574516\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> the slope of the line is 7/3 so you're correct there.<BR>\n" );
document.write( "the equation of the line depends on the slope and the y-intercept.<BR>\n" );
document.write( "many lines can have the slope of 7/3.<BR>\n" );
document.write( "only one of them can pass through a certain point.<BR>\n" );
document.write( "did they specify the point that the line goes through?<BR>\n" );
document.write( "they usually do.<BR>\n" );
document.write( "alternately, you may have just had to select a line that satisfies the criteria that the slope is 7/3 from the selections given.<BR>\n" );
document.write( "that would have required you to find the slope of all the selections and then pick the one that had the slope of 7/3. <BR>\n" );
document.write( "presumably only one of them would have had that slope.<BR>\n" );
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