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 Post subject: y=100655x^-1.524Posted: Wed, 8 Sep 2010 21:43:02 UTC

Joined: Wed, 8 Sep 2010 21:38:04 UTC
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Hi
Can someone help me rearrange the equation so that x is on the left instead of y?

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 Post subject: Posted: Wed, 8 Sep 2010 21:44:51 UTC
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 Post subject: Posted: Wed, 8 Sep 2010 21:56:18 UTC

Joined: Wed, 8 Sep 2010 21:38:04 UTC
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Hi
Can someone help me rearrange the equation y=100655x^-1.524 so that x is on the left instead of y?

Thanks!

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 Post subject: Posted: Wed, 8 Sep 2010 22:00:56 UTC
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lynruss wrote:
Hi
Can someone help me rearrange the equation y=100655x^-1.524 so that x is on the left instead of y?

Thanks!

Start by taking dividing, then taking logs.

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 Post subject: Posted: Wed, 8 Sep 2010 22:07:38 UTC

Joined: Wed, 8 Sep 2010 21:38:04 UTC
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Thanks for your quick help!. Ive done the dividing:

now have y/100655 = x^-1.524

but not sure about the next bit. by logs do you mean logarithms? not sure I did those at school!

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 Post subject: Posted: Wed, 8 Sep 2010 22:08:43 UTC
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lynruss wrote:
Thanks for your quick help!. Ive done the dividing:

now have y/100655 = x^-1.524

but not sure about the next bit. by logs do you mean logarithms? not sure I did those at school!

That's the only way to do it. Check out wikipedia for a primer on them if you perhaps have forgotten.

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 Post subject: Posted: Wed, 8 Sep 2010 22:09:45 UTC
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lynruss wrote:
Thanks for your quick help!. Ive done the dividing:

now have y/100655 = x^-1.524

but not sure about the next bit. by logs do you mean logarithms? not sure I did those at school!

Alternatively, if all you want to do is have x on the left and not necessarily SOLVE for x, then just write the equation backwards.

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 Post subject: Posted: Wed, 8 Sep 2010 22:33:57 UTC

Joined: Wed, 8 Sep 2010 21:38:04 UTC
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Hi
I want to solve for X , basically I added a trendline to a graph which is represented by given formula and I want to use this formula to find x for any future given value of y.

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 Post subject: Posted: Wed, 8 Sep 2010 22:34:21 UTC
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lynruss wrote:
Hi
I want to solve for X , basically I added a trendline to a graph which is represented by given formula and I want to use this formula to find x for any future given value of y.

Then you'll need logs.

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 Post subject: Posted: Thu, 9 Sep 2010 06:30:17 UTC
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lynruss wrote:
Hi
Can someone help me rearrange the equation y=100655x^-1.524 so that x is on the left instead of y?

Thanks!

You have , hence raising each side to the -th power...

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 Post subject: Posted: Thu, 9 Sep 2010 10:08:33 UTC
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RULE: If x^p = y then x = y^(1/p)
You didn't know that?

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 Post subject: Posted: Fri, 10 Sep 2010 23:51:48 UTC

Joined: Wed, 8 Sep 2010 21:38:04 UTC
Posts: 5
Marvellous, thank you

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