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#1 2006-12-14 09:04:14

Neha
Member
Registered: 2006-10-11
Posts: 173

distance

find the distance from the point (3,-7) to the line x = -1.

this way ofcourse....!!!
y = -1x + b


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#2 2006-12-14 10:48:50

mathsyperson
Moderator
Registered: 2005-06-22
Posts: 4,900

Re: distance

y ≠ -x + b.

y doesn't relate to x at all, because x is always -1.

And because x is always -1, then a point with an x coordinate of 3 is [3-(-1)=] 4 away from the line.


Why did the vector cross the road?
It wanted to be normal.

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