Equation of a line (y=Mx+b)

[Token]

y+Mx+b

Isn't this a term that almost every student from gr 9 all the way to 12 hates! how about when you have to find 4 of these equations to identify a shape! yes it can get to be a very long and drawn out process! so0o I created a program that does it for u ! yes, very helpfull but you know what would be even more helpfull? a program that finds the reciprocal of the equation... its coming, give me time almost done just working on outputing the information to a .txt file. also it will include finding the midpoint of a line and the distance between any two points on the cartesian plane! well hope this helps !

code:

var x, y, x1, x2, y1, y2, m : real loop     put "\n\nTo find the formula of the line"     put "\nEnter the first coordinate."     put "X: " ..     get x1     put "Y: " ..     get y1     put "\nEnter the seccond coordinate."     put "X: " ..     get x2     put "Y: " ..     get y2     put "\nSlope for XY"     put "M=Rise/Run"     put "M= (Y2-Y1) / (X2-X1)"     put "M= (", y2, "-", y1, ") / (", x2, "-", x1, ")"     put "M= (", y2 - y1, ") / (", x2 - x1, ")"     if y2 - y1 = 0 then         put "This is a horosontal line."         put "Y= 0X + ", y1     elsif x2 - x1 = 0 then         put "This is a vertical line."         put "Y= 0X "     else         put "M= ", (y2 - y1) / (x2 - x1)         m := (y2 - y1) / (x2 - x1)         x := x1         y := y1         put "\n Formula of the line"         put "Y=M X + b"         put y, "=", m, " (", x, ")+b"         put y, "=", m * x, "+b"         put y, "+", m * x, "=", m * x, "-", m * x, "+b"         put y + (m * x), "= b"         put "b=", y + (m * x)         put "Therefore Y=", m, "X +", y + (m * x)     end if end loop

[Neo]

Token wrote:

y+Mx+b

Isn't this a term that almost every student from gr 9 all the way to 12 hates!

Actually, no.

[Andy]

err who uses y=mx+b nymore... Ax+By+C=0 is the way to go... get use to it or ur gona flunk algebra

[Tony]

5x5 matrix of heavysides actually my algebra exam was awesome, I think I aced it... though you never now. I had to reinvent the way you check if vectors are colinear or not because damn it, it's hard to sketch out 4D on paper to check visually

anyways, good idea for the program, but it's buggy.

first set: 1/1
second set: 2/2
the equation is most defenatly not y= x + 2

[Martin]

A verticle line should be in the form of x = b

[Token]

Hey everyone, thanks for the feedback, this was my first post in compsci and its cool to see how fast everyone responds. umm ya it is a little buggy, usually only with the vertical and horosontal lines tho, my math mark is only a 72 tho so it could be my bad. umm ya at my school (in gr 10) were still using t=Mx+b, its an academic class and my teacher said we'll keep using it all through highschool. I'll look over my notes and see if i can fix up the horosontal and vertical lines if anyone has any ideas why its not working feel free to edit the code other than that thanks for your feedback and its nice working with u guys (and girls, although theyre few and far between)

[Pickles]

Quote:

err who uses y=mx+b nymore... Ax+By+C=0 is the way to go... get use to it or ur gona flunk algebra

Hooray for G&D.. I love you Ax+By+Cz+D=0

[Andy]

yes, the scalar eqn owns you and me too but shhhhh

[MihaiG]

im in gr. 9 enriched... and we just finished with y = mx + b and started with Ax+By+C=0 he he he

[Andy]

enriched? what school?

[MihaiG]

why do you ask.......???
i got to Newmarket High

[Pickles]

I dont recall ever using Ax+By+C=0 for the equation of a line until this year in G&D (although i know i learned it somewhere along the lines) hmm. Scalar equations of a plane is fun, that and solving the intersection of three planes.. such boring work

[Token]

ya well i'm in grade 10 and we just started learning Ax+By+C=0

[Mr. T]

my teacher made a calculator prog called solvesys which does all that dirty work for you

[ssr]

Token wrote:

ya well i'm in grade 10 and we just started learning Ax+By+C=0

just started?
umm I thought every school in Canda teaches that in gr. 9
ummm 8)