Re: [Phys-l] slow news day?

[brian whatcott <betwys1@sbcglobal.net>]

On 6/25/2011 2:33 PM, Bernard Cleyet wrote:
> On 2011, Jun 24, , at 04:38, chuck britton wrote:
>
> > How well would zero, zero fit your proposed curve?
> When I fitted the two points it used 0,0
>
> The RMSE was 0.  I think three points define an x^2 (only) so need more points to verify it's X^2, and not e.g. sum: X^n.
>
> bc
>
> p.s.  gal./mi. = AX^2 + C;  A=5.63E-6, and C= -8.12E-4  So not quite 0,0  [X is air speed MPH]     So I take good suggestion from chuck britton:
>
> Using added 0,0:
>
> A=5.616E-6;  C = -4.47E-4  and RMSE = 4.47E-4
>
> The graph with fits is here:
>
>
> http://www.cleyet.org/Someone_is_Wrong/Not,%20but%20an%20easy%20link./light%20plane%20mileage.tiff

I enjoy the ease with which you seem to be producing results from data 
with your new app.
 Consumption of aero engines is usually given in gals/hour or lbs/hour.
But the idea that I gain gasoline if I only travel slow enough is so 
attractive, I suspect the model's fit in practice!   :-)

Brian W