document.write( "Question 412542: Find the slope of a line perpendicular to the line that passes through the following points: (3, 9) and (7, 15) \n" ); document.write( "

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Find the slope of a line perpendicular to the line that passes through the following points: (3, 9) and (7, 15)\r
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\n" ); document.write( "\n" ); document.write( "Perpendicular lines have slopes which are negative reciprocals\r
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\n" ); document.write( "\n" ); document.write( "y2 - y1
\n" ); document.write( "-------- = slope
\n" ); document.write( "x2 - x1\r
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\n" ); document.write( "\n" ); document.write( "15 - 9
\n" ); document.write( "------- {substituted coordinates into slope formula}
\n" ); document.write( "7 - 3\r
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\n" ); document.write( "\n" ); document.write( "6
\n" ); document.write( "-- {subtracted}
\n" ); document.write( "4\r
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\n" ); document.write( "\n" ); document.write( "= 3/2 {reduced}\r
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\n" ); document.write( "\n" ); document.write( "the perpendicular slope would be -2/3 {the negative reciprocal of 3/2}
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