# Math Is Fun Forum

Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫  π  -¹ ² ³ °

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## #1 2005-08-01 23:43:57

kylekatarn
Member
Registered: 2005-07-24
Posts: 445

### .

.

Last edited by kylekatarn (2020-02-16 01:42:03)

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## #2 2005-08-02 00:29:03

MathsIsFun
Registered: 2005-01-21
Posts: 7,713

### Re: .

I think I could fit a polynomial to that, as there are no duplicate x-values. But the polynomial is likely to swing around a lot and also move wildly past the end points.

B-splines can do a neater job, but are not a single "function" as such, they are more like polynomial-segments (I can't remember the details, though)

"The physicists defer only to mathematicians, and the mathematicians defer only to God ..."  - Leon M. Lederman

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## #3 2005-08-02 00:58:12

mathsyperson
Moderator
Registered: 2005-06-22
Posts: 4,900

### Re: .

Excel says that y=-0.1481x^4+0.6293x³+4.4564x²-12.367x-8^-10, presumably to 5 significant figures each. This is a quartic function, and even though the highest required point is 8, its highest point is almost 50, so as MathsIsFun says, there is probably a better way, involving trigonometry or something.

Why did the vector cross the road?
It wanted to be normal.

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## #4 2005-08-02 02:38:41

mathsyperson
Moderator
Registered: 2005-06-22
Posts: 4,900

### Re: .

You can post pictures here as long as they are viewable somewhere else on the net.

``[img]link to picture[/img]``

If you want to upload images from your computer, I think you need to upload them onto another site first and then link to it.

Why did the vector cross the road?
It wanted to be normal.

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