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st: =?utf-8?B?UkU6IFJFOiBSRTogUkU6IFJFOiBSRTogUkU6IFJFOiA=?==?utf-8?B?c3Q6IMK0w7DCuMK0OiBzdDogSG93IHRvIGNob29zZSBhIHBy?==?utf-8?B?b3BlciBtb2RlbCBpZiB0aGUgZGVwZW5kZW50IHZhcmk=?==?utf-8?B?YWJsZSBpcyB3aXRoaW4gYm91bmRzPw==?=


From   "Nick Cox" <[email protected]>
To   <[email protected]>
Subject   st: =?utf-8?B?UkU6IFJFOiBSRTogUkU6IFJFOiBSRTogUkU6IFJFOiA=?==?utf-8?B?c3Q6IMK0w7DCuMK0OiBzdDogSG93IHRvIGNob29zZSBhIHBy?==?utf-8?B?b3BlciBtb2RlbCBpZiB0aGUgZGVwZW5kZW50IHZhcmk=?==?utf-8?B?YWJsZSBpcyB3aXRoaW4gYm91bmRzPw==?=
Date   Mon, 2 Oct 2006 15:00:59 +0100

I don't think guessing is needed here, as this is basic 
trigonometry, but yes, 
vertical change = horizontal change X slope. 

Nick 
[email protected] 

Cheng, Xiaoqiang
 
> Thank you very much.
> 
> To make it clear, let's forget what I have said.
> 
> What I want to know is, since dy/dx is the approximate slope 
> and it should be explained as how much y will change respect 
> to one unit change of x. In this case, I guess it will be 
> right if we devide the value of the slope by 100 in order to 
> know how much y will change respect to 1/100 unit change of x.
> 

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