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by pre-gmat » Mon Aug 25, 2008 2:55 pm
I was looking for some questions on net and found this one:

In the xy-plane, line l passes through the origin and is perpendicular to the line4x+y=k,?

Source:
https://answers.yahoo.com/question/index ... 025AANmTe1

The explanation has one of the points that mentions:

When a line passes through origin, the constant K will be 0.

Can someone explain this.
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by kuroneko1313 » Mon Aug 25, 2008 4:16 pm
It passes through the origin which is the point (0, 0).

So plug in into the equation:

4x + y = k
4(0) + 0 = k
so we get k = 0

Hope that helps.
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by pre-gmat » Mon Aug 25, 2008 5:50 pm
yes it does :)

Thanks
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