document.write( "Question 366438: What is the equation of a line that is perpendicular to the line y = 3x + 9 and containing the point (6, –4)?\r
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\n" ); document.write( "\n" ); document.write( "What is the equation of a line that is parallel to the line y=1/2x+7 equation and containing the point (–4, 7)?
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Algebra.Com's Answer #261127 by mananth(16946)\"\" \"About 
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What is the equation of a line that is perpendicular to the line y = 3x + 9 and containing the point (6, –4)?
\n" ); document.write( "..
\n" ); document.write( "y=3x+9
\n" ); document.write( "slope = 3
\n" ); document.write( "slope of line perpendicular to this line will be negative reciprocal
\n" ); document.write( "= -1/3
\n" ); document.write( "Point(6,-4)
\n" ); document.write( "equation of line passing through point (x1,y1)
\n" ); document.write( "=(y-y1)=m(x-x1)
\n" ); document.write( "=(y-(-4)=-1/3(x-6)
\n" ); document.write( "=y+4 = -x/3+2
\n" ); document.write( "y=-1/3*x -4+2
\n" ); document.write( "y= -1/3 *x -2
\n" ); document.write( "...
\n" ); document.write( "The graph will be as below\r
\n" ); document.write( "\n" ); document.write( "\"graph%28300%2C300%2C-5%2C5%2C-5%2C5%2C%283x%2B9%29%2C%28%28-x%2F3%29-2%29%29\"\r
\n" ); document.write( "\n" ); document.write( "and \r
\n" ); document.write( "\n" ); document.write( "What is the equation of a line that is parallel to the line y=1/2x+7 equation and containing the point (–4, 7)?
\n" ); document.write( "..
\n" ); document.write( "y= 1/2 x +7
\n" ); document.write( "slope = 1/2
\n" ); document.write( "since line required is parallel slope will be same = 1/2
\n" ); document.write( "Point ( -4,7)
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\n" ); document.write( "y-y1=m(x-x1)
\n" ); document.write( "y-7=1/2(x+4)
\n" ); document.write( "y-7= x/2 +2
\n" ); document.write( "y=x/2 +9
\n" ); document.write( "...
\n" ); document.write( "\"graph%28300%2C300%2C-10%2C2%2C-2%2C10%2C%28%28x%2F2%29%2B7%29%2C%28%28x%2F2%29%2B9%29%29\"
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