A mildly relevant question

Xisiqomelir · Post by **Xisiqomelir** » 2004-02-27 01:37pm

I know everyone ends up with y = mx + b, but which do you normally start with?

Mitth`raw`nuruodo · Post by **Mitth`raw`nuruodo** » 2004-02-27 01:40pm

I use y=mx+b because it's just.. easier, I guess. Unless you dont know the y-intercept, in which case you have to go with the 2nd one... I think.

*did this last year and has already forgotten*

Oddysseus · Post by **Oddysseus** » 2004-02-27 01:50pm

I am an old fan of y = mx +b.

But for some higher level statistics and regressions I generally turn and use the alternative. You just need 2 point to determine the slope, then take that and one point to generate the y-value.

TheDarkOne · Post by **TheDarkOne** » 2004-02-27 02:15pm

How about Ax + By = C?

or maybe

R=(x,y,z) + n(x',y',z')?

El Moose Monstero · Post by **El Moose Monstero** » 2004-02-27 02:28pm

I've always quite liked the latter, even though the former was more use, the second one did me well in the Pure Maths exams at AS level.

Luke Starkiller · Post by **Luke Starkiller** » 2004-02-27 02:41pm

The second is useful for interpolation on steam tables.

Joe · Post by **Joe** » 2004-02-27 02:46pm

y = F + vx

F = Fixed Costs
vx = Variable costs.

This is the equation used in cost accounting to describe cost behavior, and the one I most often use.

Sharp-kun · Post by **Sharp-kun** » 2004-02-27 07:11pm

I use y = mx + c

Sarevok · Post by **Sarevok** » 2004-02-27 11:36pm

Me too.

Post by **haas mark** » 2004-02-27 11:48pm

y = mx + b was the first I learned. Then progressed to ax + cy = b after that. -shrugs-

Howedar · Post by **Howedar** » 2004-02-27 11:59pm

y = ax + b is more convenient, but I more often have to start with y - y1 = m(x - x1)

SyntaxVorlon · Post by **SyntaxVorlon** » 2004-02-28 03:38am

Bah, always use parametric symmetry.
(x-a)/A=(y-b)/B=(z-c)/C=...
Works in any euclidean geometry.
R(3) through infinity.

2000AD · Post by **2000AD** » 2004-02-28 01:00pm

I got taught y = mx + c (or in this case y = mx + b)

StarDestroyer.Net BBS

A mildly relevant question

How do you do the equation of a line?

A mildly relevant question