IA Type II -- G-Force Tolerance

[ConfusedIBer]

How did you guys get to the equation...?

I just plotted it into Excel and grabbed the exponential function.

Can someone explain to me why it isn't Power but it is Exponential?

Power seems to fit even better too.

And how would you derive that equation by hand...

I also noticed someone talking about R-squared value... what is that?

That is something that I am very confused with as well.

What is the difference between a Power function and an Exponential function?

[Abdominal Procrastinator]

I finished this in May, and yes i think I got a Power Regression on my GDC. It's not an exponential one

Edited September 29, 2010 by Bob Kilmon

[mathsworld]

hey wwhat is the thing with excel?

how to calculate r-square?

Edited October 9, 2010 by Mahuta ♥
Do not use text speak- Maha

[spinks-07]

So I just got my portfolio type II in math SL and it's the G-Forces.

So I've complete the portfolio up the part where I need to describe the apparent trends.

I've also figured out that the function can be a power function.

But now i'm at the part where it asks to explain why i chose to use power functions and to create an equation that fits the graph.

Plz help. i honestly suck at math, and i don't even noe wats going on

[NA19]

Exponential means y=2^x right? And why can't it be reciprocal, with the constraint of x>0?

[Zakiyya]

hey since untrained humans are able to tolerate 17g for several minutes, would that be a constraint on the data?

[spinks-07]

ya, what does it mean by

on a new set of axes, draw your model function and the original data points

Edited October 9, 2010 by Mahuta ♥
no text speak-Maha

[itsme]

are you putting the g-force as the independent or depenedent variable? can't you argue both?

[harvard123]

what i dont understand is why it is not a power equation. That seems to fit MUCH better than the exponential one. Also, if it were power what would the base equation be?

y = a(x^b)+c

[music]

hey sorry, is g-force the independent variable or would it be time?

because the way i see it, both statements:

amount of g-force tolerated is dependent on time

amount of time conscious is dependant on amount of gforce

would work.

[Narcissist]

hey sorry, is g-force the independent variable or would it be time?

because the way i see it, both statements:

amount of g-force tolerated is dependent on time

amount of time conscious is dependant on amount of gforce

would work.

For me I've put g-force as y.

But mainly because it felt natural having time on the x-axis.

[ib=death]

i think its arguable that the independent and dependent variables can be interchanged (they both seem to work when graphed) at first i thought it was an exponential function, and i think it still works, but a power graph fits a lot better, although i havent learned what a power graph is...i think theres a variety of answers (like it can be half a parabola, a ln graph, etc.)

i honestly do not know where to start...

[Narcissist]

I have the same syndrome as some others here where I praise excel for automatic trendlines and wear mental paper cuts for not knowing what that is

updt: hyperbolically speaking that is

Edited October 9, 2010 by Narcissist

[Whichname]

Hey guys,.at the moment I'm stuck because I cannot insert the functions for the graph...can anyone tell me what should I do and how do I see which equation fits best the graph?

[Jaedon]

Can somebody please help me to discover the parameters of the power function (x^b). It's taking me FOREVER to find it!

[mango_pie]

Does anyone know how to derive the equation for the horizontal G-force? I was absent while learning this last year, and i have no idea how to play around with base functions and change them to fit the graph :|

[Jennyferxoxo]

I used a power function to fit the data because the relationship is stronger and is a better representation of the data. (r-value closest to -1)

Does anyone know how to do a good analysis of a graph? we do it in class sometimes and my teacher always marks mine as "Weak"

Does anyone know how to derive the equation for the horizontal G-force? I was absent while learning this last year, and i have no idea how to play around with base functions and change them to fit the graph :|

can't you just take a few random points from the data and plug them into the equation?

[begum]

Have you found any constraints for the data?

[OrangeBeanie]

Is the time on the y axis or x axis?

[Hexa]

I used a power function to fit the data because the relationship is stronger and is a better representation of the data. (r-value closest to -1)

Does anyone know how to do a good analysis of a graph? we do it in class sometimes and my teacher always marks mine as "Weak"

Does anyone know how to derive the equation for the horizontal G-force? I was absent while learning this last year, and i have no idea how to play around with base functions and change them to fit the graph :|

can't you just take a few random points from the data and plug them into the equation?

I heard that there are two points where it's easier to do so. Anyone figure out what those points are?

Edit: Found it. It helps if you keep Time as x and +Gx as y. Then use the point 1,11 for simultaneous equations.

Edited October 14, 2010 by hexashadow13