Graphing Calculator Help: Twovariable Analysis Message #1 Posted by Amy J on 23 Jan 2007, 2:50 p.m.
Hey there, I'm a homeschooled highschool student and all I have to work with is a Durabrand 828 Graphing Scientific Calculator. If you want to see what it looks like, here it is:
I'm taking Saxon Advanced Mathematics, and I'm currently learning how to perform twovariable analysis using a graphing calculator. my book is somewhat idiotic, because it automatically assumes i know how to use a graphing calculator... even though this would be the first lesson I've had involving one. Anyways, this is all my book says:
Quote:
Graphing calculators use the least squares algorithm to do linear regressions. All you have to do is enter the x data points in one list, enter the y data points in another list, and press the proper key. The TI82 gives the following display for these data:
LineReg
y=ax+b
a=.2075
b=25.64
r=.7824726541
Ok, so anyways I understand... in my textbook it says the data points are: x= 82,87,97,107,107 and y= 9.5,5.5, 7.5, 1.5, 4.6
So I just need to "enter the x data points in one list, enter the data points in another list, and press the proper key" but what the heck is the "proper key"? I don't know, I'm very confused and they didn't give me hardly any info. I don't have a flashiest calculator anyways... but isn't there a way I can do this? Please help!
Edited: 23 Jan 2007, 2:51 p.m.
