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#1 2013-05-15 04:11:43

mom
Member
Registered: 2012-04-25
Posts: 94

value

I have no idea why but I completely forgot how to do this one.

find the value of a such that the three points (1,3), (6,5), and (a,-1) lie on the same line.

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#2 2013-05-15 04:19:45

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 87,258

Re: value

Hi mom;

Use the point point equation for the first two points and then just solve for a. a = - 9.


In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

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#3 2013-05-15 04:58:51

mom
Member
Registered: 2012-04-25
Posts: 94

Re: value

Ok, thanks. No idea why it was throwing me off

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#4 2013-05-15 05:02:07

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 87,258

Re: value

You are welcome.


In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

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#5 Yesterday 23:11:59

DeanPemberton
Member
From: USA
Registered: Yesterday
Posts: 9
Website

Re: value

You use the formula of three points lying in the same line and find all the points of the line.  First you have to find the slope of the line then find by equation of line "y-y1=m(x-x1). Then definitely you will get its answer.

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