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exon111
Joined: 03 Oct 2006
Posts: 6
Location: OC, CA, USA
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 Posted: October 23, 2006 6:53 PM Post subject: Solving and graphing a linear equation |
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How do I make the TI-89 Titanium solve a linear equation such as "x+y=3"? If I solve for Y I get "y=3-x". I want it to give me the solution set: (1, 2) (2, 1) (4, -1) (-1, 4), etc. Also how do I make it graph "x+y=3"? That is a basic example, a more compled one would be "3x+2y-9=0". Any tips would be appreciated.
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"Expect my questions to be basic and stupid, I'm only in high school algebra 2 and I am bad at math  " |
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bostonvaulter
Joined: 13 Oct 2006
Posts: 43
Location: USA
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| Posted: October 24, 2006 12:33 PM Post subject: |
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it would take two steps. First you would have to solve the equation for y. Then you would have to graph it.
To solve: solve(x+y=3, y)
Then copy (green+copy) it.
To graph: first go to graphing screen, then paste the equation, getting rid of the y= part |
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rockvee
Joined: 24 Sep 2006
Posts: 45
Location: London, Ontario
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| Posted: October 24, 2006 12:58 PM Post subject: |
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| bostonvaulter wrote: | it would take two steps. First you would have to solve the equation for y. Then you would have to graph it.
To solve: solve(x+y=3, y)
Then copy (green+copy) it.
To graph: first go to graphing screen, then paste the equation, getting rid of the y= part |
then go to table you will see the ordered pairs |
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exon111
Joined: 03 Oct 2006
Posts: 6
Location: OC, CA, USA
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| Posted: October 24, 2006 6:55 PM Post subject: |
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Where is the the graphing screen? I went to the app called graph, but it said undefined variable when I hit enter. There was no place were I could paste the 3-x into it. Where do I find the are to paste it?
Thanks
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"Expect my questions to be basic and stupid, I'm only in high school algebra 2 and I am bad at math " |
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rockvee
Joined: 24 Sep 2006
Posts: 45
Location: London, Ontario
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| Posted: October 25, 2006 1:17 PM Post subject: |
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| exon111 wrote: | Where is the the graphing screen? I went to the app called graph, but it said undefined variable when I hit enter. There was no place were I could paste the 3-x into it. Where do I find the are to paste it?
Thanks |
paste 3-x to y= editer |
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bostonvaulter
Joined: 13 Oct 2006
Posts: 43
Location: USA
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| Posted: October 27, 2006 6:05 PM Post subject: |
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| rockvee wrote: | | paste 3-x to y= editer |
and to get to the y= editor,
type [diamond] [y=]
y= is under [f1] |
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