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aDDiCT
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by aDDiCT » Sun 02 Jan, 2005 9:09 pm
i have a ti-83+ and want to know how to input the graph points and make it spit out the y intercept form equation, anyone help me?
such as (-8,5) (5,3)
and give me the y intercept equation
ie y=mx+b
CoBB
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by CoBB » Sun 02 Jan, 2005 9:44 pm
If you are lazy you can calculate a linear regression for two points... IMHO it's easier to do it directly or write a simple basic program to automate the process. The equation is quite simple:
m=(y2-y1)/(x2-x1)
b=y1-m*x1(=y2-m*x2)
Guest
Post
by Guest » Sun 02 Jan, 2005 11:33 pm
i cant write programs, dont know the code
i'll search for one at ticalc.org, hope they have one
but what i wanna know, is where to put the graph points in, and what to push to get the equation
tr1p1ea
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by tr1p1ea » Mon 03 Jan, 2005 3:50 am
Push 'Y=' enter the equations then hit 'Graph'. You might also have to do a 'Zoom' then 'ZStandard' as well.
"My world is Black & White. But if I blink fast enough, I see it in Grayscale."
teoryn
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by teoryn » Mon 03 Jan, 2005 7:12 am
put your x's in L1, y's in L2, run linear regression.
Read the Manual, page 12-25 in the 83+ and 83 handbooks.
DarkAuron
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by DarkAuron » Mon 03 Jan, 2005 8:49 am
*hands you a piece of paper and a mechanical pencil full of 0.5mm lead
*
[Gridwars Score] - E: 1860037 M: 716641 H: 261194
randroid
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by randroid » Mon 03 Jan, 2005 7:35 pm
DarkAuron wrote: *hands you a piece of paper and a mechanical pencil full of 0.5mm lead
*
seconds that and throws in one giant eraser... cause the way it sounds hes gonna need it.
DarkAuron
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by DarkAuron » Tue 04 Jan, 2005 2:36 am
I'm sure he'll figure it out soon
[Gridwars Score] - E: 1860037 M: 716641 H: 261194