# Help Major - Logs + TI-83+

1. May 18, 2004

### Keifi

Anybody know how to use a table of numbers (in the stat -> edit place) to generate a log equation...?

can you explain this step by step for me?

stat->edit place ex.

L1 L2
2 123213
4 12321312312
5 231123123123123
324 123123123123
2234 12312312321
123424 12312321
(just an example)

2. May 18, 2004

### Keifi

Or can you teach me how to make a log formula without a calulator

(real data as follows)
:
Time 1:30 1:35 1:40 1:45 1:50 1:55 2:00 2:05 2:10 2:15 2:20 2:25 2:30 2:45 3:00 3:15 3:30 4:00 4:30 5:00 5:30
Difference 101 91 76 73 66 62 58 53 51 50 46 42 40 34 28 22 20 16 10 6 2

3. May 19, 2004

### Simon666

You could use Taylor series for that but I have the impression that is not what you're looking for.

4. May 19, 2004

### Keifi

funny thing is, i dont have any idea what you just meant... but anyways i got it.. sooooo simple i feel soo dumb :rofl: :rofl:

but anyways, a random comment :
check out the picture i made, tell me if u like

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5. May 19, 2004

### Simon666

I meant this:

This calculates the natural logarithm but converges very slowly, so as I guess you want it to be calculated by hand it isn't very convenient. Nice pic, would get you a lot of female attention at Abu Ghraib. Anyway, I seem to have misunderstood your question. Sorry for that.

Last edited: May 19, 2004
6. May 19, 2004

### Parth Dave

on your calculator there is lnreg (ln regression) go to:
before you use it, make sure you turn diagnostic on (go to the catalog [second --> 0]) and find the diagnostic on, and select that