My Math Forum Find an equation that fits into coordinates.

 Algebra Pre-Algebra and Basic Algebra Math Forum

 August 5th, 2009, 11:39 AM #1 Member   Joined: Aug 2009 From: Copenhagen, Denmark Posts: 45 Thanks: 0 Find an equation that fits into coordinates. Hey all If i have some coordinates that are: (1,1) ; (2,10) ; (3,3) ; (4,12) ; (5,5) ; (6,14) etc. How to find the equation that fits into that? Thanks in advance thesixmax
 August 5th, 2009, 12:14 PM #2 Global Moderator   Joined: Dec 2006 Posts: 20,469 Thanks: 2038 The data have the form (n, n + 4 + 4(-1)^n), where n = 1, 2, 3, 4, 5, 6, etc.
 August 5th, 2009, 12:16 PM #3 Senior Member   Joined: May 2008 From: York, UK Posts: 1,300 Thanks: 0 Re: Find an equation that fits into coordinates. It depends. The most obvious I can see is $y=\begin{cases}x&\text{ if }x\text{ is odd,}\\x+8=&\text{ if }x\text{ is even,}\end{cases}=$ to give you the pairs $(x,y),$ but there are infinitely many possibilities (for example $y=x+4(1+\cos(\pi x)).$
August 5th, 2009, 01:43 PM   #4
Member

Joined: Aug 2009
From: Copenhagen, Denmark

Posts: 45
Thanks: 0

Re: Find an equation that fits into coordinates.

Quote:
 Originally Posted by mattpi It depends. The most obvious I can see is $y=\begin{cases}x&\text{ if }x\text{ is odd,}\\x+8=&\text{ if }x\text{ is even,}\end{cases}=$ to give you the pairs $(x,y),$ but there are infinitely many possibilities (for example $y=x+4(1+\cos(\pi x)).$
Okay, got it - it fits in perfectly! Now a second problem arises. It is related to this problem, but it will take to long to explain why.

The second problem is as follows:

if $x=16$ then $y=0$
if $x=18$ then $y=1$
if $x=20$ then $y=2$

How to find the function that fits?
Any suggetions?

/thesixmax

 August 6th, 2009, 01:34 AM #5 Global Moderator   Joined: Dec 2006 Posts: 20,469 Thanks: 2038 The simplest possibility is y = (x - 16)/2.
August 8th, 2009, 09:52 AM   #6
Member

Joined: Aug 2009
From: Copenhagen, Denmark

Posts: 45
Thanks: 0

Re:

Quote:
 Originally Posted by skipjack The simplest possibility is y = (x - 16)/2.
Thanks a lot!

 Tags coordinates, equation, find, fits

 Thread Tools Display Modes Linear Mode

 Similar Threads Thread Thread Starter Forum Replies Last Post Gamblecampbell Applied Math 2 January 24th, 2014 03:28 PM qweryy Algebra 9 August 9th, 2013 01:01 AM leakymemory Algebra 0 January 3rd, 2013 11:24 AM ivalmian Applied Math 0 January 31st, 2012 10:08 AM Axle12693 Algebra 4 May 14th, 2008 10:56 AM

 Contact - Home - Forums - Cryptocurrency Forum - Top