document.write( "Question 432251: What is the slope of any line perpendicular to the line formed by the equation -7x + 63y = 9? \n" ); document.write( "
Algebra.Com's Answer #299754 by algebrahouse.com(1659)\"\" \"About 
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\"What is the slope of any line perpendicular to the line formed by the equation
\n" ); document.write( "-7x + 63y = 9?\"\r
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\n" ); document.write( "\n" ); document.write( "Slope-intercept form is y = mx + b
\n" ); document.write( "m is the slope
\n" ); document.write( "b is the y-intercept\r
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\n" ); document.write( "\n" ); document.write( "-7x + 63y = 9
\n" ); document.write( "63y = 7x + 9 {added 7x to both sides}
\n" ); document.write( "y = (1/9)x + 1/7 {divided both sides by 63}
\n" ); document.write( "slope = 1/9\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( "If the slope of this line is 1/9,
\n" ); document.write( "the perpendicular line would have a slope of -9.\r
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\n" ); document.write( "\n" ); document.write( "-9 is the answer
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