document.write( "Question 574378: I have to write the slope-intercept form of the equation of the line through the given point and parallel to the given line.\r
\n" ); document.write( "\n" ); document.write( "Point: (-9,8) Line: x+y=15\r
\n" ); document.write( "\n" ); document.write( "Then I have to write the slope-intercept form of the equation of the line through the given point and perpendiulat to the given line. \r
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Algebra.Com's Answer #369055 by scott8148(6628)\"\" \"About 
You can put this solution on YOUR website!
parallel means the x and y coefficients are the same, just substitute in the point to find the new constant term\r
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\n" ); document.write( "\n" ); document.write( "(-9) + (8) = -1 ___ so the new equation is, x + y = -1
\n" ); document.write( "___ get the y by itself for slope-intercept ___ y = -x - 1\r
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\n" ); document.write( "\n" ); document.write( "perpendicular means the slopes are negative reciprocals, so the slope changes from -1 to 1 ___ y = x + b\r
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\n" ); document.write( "\n" ); document.write( "to find the b term, substitute in the point (again)
\n" ); document.write( "___ (8) = (-9) + b ___ 17 = b\r
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\n" ); document.write( "\n" ); document.write( "so the perpendicular equation is ___ y = x + 17 \n" ); document.write( "
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