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kranti_surya · 2009 June 23rd, 05:20 AM

IMO B

(y+2-b)/x = (mx+2)/x
y = mx + b => Slope = m

Slopes of perpendicular lines are negative reciprocals of each other, so -1/m

2009 June 23rd, 05:20 AM	#18 (permalink)
kranti_surya I can crack it Join Date: Apr 2009 Location: San Francisco Posts: 201	IMO B (y+2-b)/x = (mx+2)/x y = mx + b => Slope = m Slopes of perpendicular lines are negative reciprocals of each other, so -1/m