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&quot;figured out it was an exponential function similar to f(x)=11* x^-0.250&quot;<br />
<br />
I have some difficulty with your notation.<br />
Using your equation I would expect something like<br />
gforce (t) = 11* t^(-0.250)<br />
which is not an exponential equation and does not come close to fitting the data.<br />
The curve is obviously non-linear so you cannot use a linear regression to check for goodness of fit<br />

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it is very close to the function that graph 4.3 calculated for the data points<br />
<br />
if you take f(1)=11 you have the starting point.<br />
from there I had to figure out how to match to the rest of the data.<br />
<br />
back original question: &nbsp;what are the parameters and what are the constraints?<br />
<br />
What is the correlation coefficient?<br />

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Might be a couple of additional comments once I better understand.<br />
-<br />
&quot;it is very close to the function that graph 4.3 calculated for the data points&quot;<br />
I do not understand this at all.<br />
If you understand what the variables are, what are they?<br />
-<br />
I am sure that the parameters are not 11 &nbsp;(you might be able to find a parameter using that data point, but any other would be as good.<br />
-<br />
What do you mean by &quot;do linear regression on ti-84&quot;?
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I think now that it is a power function, not exponential.<br />
<br />
Apologies, but I am not sure how to explain it further. &nbsp;plugged data point into graph 4.3 and had it plot the best fit using different graph types. &nbsp;found one that fit the data points.<br />
<br />
Do you know what my parameters are? <br />
<br />
to answer the question about &quot;do linear regression on ti-84&quot; please refer to <a href="http://mathbits.com/mathbits/tisection/statistics2/correlation.htm" rel="ugc">http://mathbits.com/mathbits/tisection/statistics2/correlation.htm</a>
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&quot;graph 4.3&quot;<br />
and what is graph 4.3. It does not seem to be available to me.
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<a href="http://download.cnet.com/Graph/3000-2053_4-10063417.html" rel="ugc">http://download.cnet.com/Graph/3000-2053_4-10063417.html</a>
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My focus has moved on. &nbsp;Only so much time to spend on mental exercises. &nbsp;Thanks. &nbsp;<br />
<br />
On to the next pursuit.<br />
<br />
I will give you the points since you are the only one who took the time to help out.<br />

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<div class="content wysiwyg-content">
given gravitational data points<br />
<br />
Time (min) &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; gforce<br />
.01 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;35<br />
.03 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 28<br />
.1 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 20<br />
.3 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 15<br />
1 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;11<br />
3 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 9<br />
10 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;6<br />
30 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;4.5<br />
<br />
I understand what the variables are, &nbsp;what are the parameters(it is 11?) &nbsp;and what constraints are there. &nbsp;figured out it was an exponential function similar to f(x)=11* x^-0.250<br />
<br />
Also need to figure the correlation coefficient for this function. &nbsp;Think it is .35 or similar (trying to do linear regression on ti-84).<br />
<br />
Might be a couple of additional questions once I better understand <br />
<br />
thanks<br />

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given gravitational data points

Time (min)                   gforce
.01                                35
.03                                 28
.1                                   20
.3                                   15
1                                    11
3                                     9
10                                  6
30                                  4.5

I understand what the variables are,  what are the parameters(it is 11?)  and what constraints are there.  figured out it was an exponential function similar to f(x)=11* x^-0.250

Also need to figure the correlation coefficient for this function.  Think it is .35 or similar (trying to do linear regression on ti-84).

Might be a couple of additional questions once I better understand 

thanks


What  are the variables, parameters and constraints of data

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