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
\n" ); document.write( "\n" ); document.write( "2x - y - 4 = 0
\n" ); document.write( "2x + y - 4 = 0
\n" ); document.write( "2x + y + 4 = 0
\n" ); document.write( "

Algebra.Com's Answer #360942 by nerdybill(7384)\"\" \"About 
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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)
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