document.write( "Question 553571: What is the equation of the line that passes through (1, 2) and is parallel to the line whose equation is 2x + y - 1 = 0? \r
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document.write( "2x - y - 4 = 0
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document.write( "2x + y - 4 = 0
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document.write( "2x + y + 4 = 0 \n" );
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Algebra.Com's Answer #360942 by nerdybill(7384)![]() ![]() You can put this solution on YOUR website! What is the equation of the line that passes through (1, 2) and is parallel to the line whose equation is 2x + y - 1 = 0? \n" ); document.write( "put: \n" ); document.write( "2x + y - 1 = 0 \n" ); document.write( "into \"slope-intercept\" form: \n" ); document.write( "2x + y - 1 = 0 \n" ); document.write( "2x + y = 1 \n" ); document.write( "y = -2x + 1 \n" ); document.write( "now, we know the slope is -2 \n" ); document.write( "\"parallel\" lines must have the same slope \n" ); document.write( "use -2 and (1,2) to populate \n" ); document.write( "\"point-slope\" form: \n" ); document.write( "y - y1 = m(x - x1) \n" ); document.write( "y - 2 = -2(x - 1) \n" ); document.write( "y - 2 = -2x + 2 \n" ); document.write( "y = -2x + 4 (slope-intercept form) \n" ); document.write( "2x + y -4 = 0 (standard form) (answer) \n" ); document.write( " \n" ); document.write( " |