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Lock · 2009 May 22nd, 07:32 PM

The answer should be B.
We have: y=mx+b. Now assuming that b=0 and m=2, we have y=2x. If we rotate this line 90 degrees, the equation of this new line will be y=(-1/2)*x. Here, the slope is (-1/m). Hence, B.

2009 May 22nd, 07:32 PM	#2 (permalink)
Lock Within my grasp! Join Date: Apr 2009 Posts: 245	The answer should be B. We have: y=mx+b. Now assuming that b=0 and m=2, we have y=2x. If we rotate this line 90 degrees, the equation of this new line will be y=(-1/2)x. Here, the slope is (-1/m). Hence, B. Last edited by Lock : 2009 May 22nd at 08:38 PM.*