document.write( "Question 477152: Determine the value of r so that the line through (6,r) and (9,2) is perpendicular to 5x-3y-9. Please help, I don't know how to do this at all. Thanks in advance. \n" ); document.write( "
Algebra.Com's Answer #329381 by lwsshak3(11628)\"\" \"About 
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Determine the value of r so that the line through (6,r) and (9,2) is perpendicular to 5x-3y-9.
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\n" ); document.write( "assuming given equation is correctly written as follows:
\n" ); document.write( "5x-3y=9
\n" ); document.write( "rewrite in standard form for a straight line: y=mx+b, m=slope, b= y-intercept
\n" ); document.write( "3y=5x-9
\n" ); document.write( "y=5x/3-3
\n" ); document.write( "slope,m,=5/3
\n" ); document.write( "..
\n" ); document.write( "Slope of line perpendicular to given equation and passing thru (6,r) and (9,2)
\n" ); document.write( "=-1/m=-3/5=∆y/∆x=(2-r)/(9-6)
\n" ); document.write( "-3/5=(2-r)/3
\n" ); document.write( "-9=10-5r
\n" ); document.write( "5r=10+9=19
\n" ); document.write( "r=19/5 \n" ); document.write( "
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