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## #26 2006-10-23 23:38:34

Toast
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### Re: Equation of a Straight Line

Hai, we use y=mx+c in Australia

## #27 2006-10-24 14:22:23

ganesh
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### Re: Equation of a Straight Line

I remember, I was asked this question at the time of my entry into University in an interview. The Head of the Department, Physics asked me this question. And this is exactly the formula I gave. He was impressed and suggested me to graduate in Mathematics instead of Physics. A pity, I chose Physics instead.

Character is who you are when no one is looking.

## #28 2006-11-18 18:51:53

Toast
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### Re: Equation of a Straight Line

#### Zhylliolom wrote:

I've never heard of any of the equations in this thread. In my studies I have always used

where ζ is Riemann's zeta function, Γ(x) is the gamma function, ∇ is the del operator, L-1 denotes the inverse Laplace transform, Tn is the nth Chebyshev polynomial of the first kind, C is a simple closed curve bounding a region having z = a as an interior point, σ0m is a simplex of an oriented simplicial complex and [σm, σm - 1] is an incidence number, S is a compact, orientable, differentiable k-dimensional manifold with boundary in En and ω is a (k - 1)-form in En, defined, and C1 at all points of S, and η(x) is Dirichlet's eta function.

(Sorry for stealing your joke, Ricky. )

...is that actually a straight line equation or is it a whole bunch of mathematical mumbo-jumbo?

## #29 2006-11-19 00:04:03

mathsyperson
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### Re: Equation of a Straight Line

That is actually a straight line equation or it is a whole bunch of mathematical mumbo-jumbo.

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

## #30 2006-11-19 04:30:29

Toast
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### Re: Equation of a Straight Line

Now I'm even more confused

## #31 2008-03-02 20:51:40

FFFFFF-
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### Re: Equation of a Straight Line

In Finland we use the equation y= kx+b, where k = the gradient, and b = the y-intercept, if anyone's interested to know.

Last edited by FFFFFF- (2008-03-02 20:52:09)

## #32 2008-03-02 21:12:52

MathsIsFun

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### Re: Equation of a Straight Line

Thanks "FFF...", I will add that.

"The physicists defer only to mathematicians, and the mathematicians defer only to God ..."  - Leon M. Lederman

## #33 2008-09-15 20:21:26

sitting
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### Re: Equation of a Straight Line

in sweden we type: y = kx + m

m = the y-intercept

^^

Last edited by sitting (2008-09-15 20:22:11)

## #34 2008-09-15 22:32:23

MathsIsFun

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### Re: Equation of a Straight Line

Are you sure, sitting? "m" is normally the gradient ... !

"The physicists defer only to mathematicians, and the mathematicians defer only to God ..."  - Leon M. Lederman

## #35 2008-10-11 04:18:00

lukeqwerty
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### Re: Equation of a Straight Line

here in singapore we use y = mx +c too, but most of us use y-y1= m(x-x1)

## #36 2008-10-11 17:19:06

ganesh
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### Re: Equation of a Straight Line

lukeqwerty,
this equation is used to find the equation of a given straight line when two points on the cartesian plane are given, namely x1 and y1.

Character is who you are when no one is looking.

## #37 2009-03-03 22:22:23

sfd
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### Re: Equation of a Straight Line

Australia uses y=mx+c

## #38 2009-03-04 00:56:43

ganesh
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### Re: Equation of a Straight Line

India too uses y = mx + c.
(we have the same origin, don't we? Gondwanaland )

Character is who you are when no one is looking.

## #39 2009-03-04 13:15:09

JaneFairfax
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### Re: Equation of a Straight Line

Last edited by JaneFairfax (2009-03-05 04:02:14)

Q: Who wrote the novels Mrs Dalloway and To the Lighthouse?

## #40 2009-04-06 07:20:17

random_fruit
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### Re: Equation of a Straight Line

I'd just like to point out that in post #5, where Ricky divides by product of a and b, his transform does not work if either a or b is zero.  Therefore, his super-complex formula does not work for either y = ax (because b=0) or y = b (cos a=0).

Just me being picky.

## #41 2009-04-06 07:24:20

random_fruit
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### Re: Equation of a Straight Line

Oops - I spotted Jane's contribution only when my post caused page 2 of the discussion to be displayed; until then I hadn't got as far as page 2.  Can I console myself that I had a similar idea to Jane?

## #42 2009-10-21 20:24:53

wintersolstice
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### Re: Equation of a Straight Line

#### JaneFairfax wrote:

Actually yes they can!

y=∞x+c LOL

Why did the chicken cross the Mobius Band?
To get to the other ...um...!!!