# Graphing 2 independent and 1 dependent

• Dec 11th 2011, 02:20 PM
Jubbly
Graphing 2 independent and 1 dependent
Hey guys, I was wondering how would you graph 2 independent variables on a TI-84.
So lets say I have for x data points 3,2,1. And the other x variables are 2,3,4. My y variables are 5,10,15.

How would I find the best fit line and the intersection? Thanks! (Happy)
• Dec 11th 2011, 04:35 PM
skeeter
Re: Graphing 2 independent and 1 dependent
Quote:

Originally Posted by Jubbly
Hey guys, I was wondering how would you graph 2 independent variables on a TI-84.
So lets say I have for x data points 3,2,1. And the other x variables are 2,3,4. My y variables are 5,10,15.

How would I find the best fit line and the intersection?

are you asking about one function w/ coordinates (3,5), (2,10) and (1,15) and another function with coordinates (2,5), (3,10) and (4,15) ?
• Dec 12th 2011, 04:53 PM
HallsofIvy
Re: Graphing 2 independent and 1 dependent
I can make no sense out of "x data points" and "x variables". If your "data" points are the value of the function for the given x and y values: x= 2, y= 5; x= 3, y= 10; x= 4, 15, then you should use another name for the value of the function- z, say. Then you have 3 points: (2, 5, 3), (3, 10, 2), (4, 15, 1). Or possibly you mean you two different kinds of "x" variable, "x data points" and "x variables" as the independent variables and "y variables" as the value of the function. That would be (2, 3, 5), (3, 2, 10), and (4, 1, 15). In any case, you will need to use 3d graphing, calling the variables (x, y, z), in that order.