Characteristics of a certain degree polynomial.

[jasonlr82794]

I have asked a similar question but it wasn't answered fully so here it goes. Why is it that you only need two points to find a linear equation, three for a quadratic and so on. What determines this and is this determined because of the characteristics of these different degree polynomials?

 

[Mark44]

Please carefully read what I posted in the other thread you started, here - https://www.physicsforums.com/showthread.php?t=691972.

If you have questions about what I wrote, reply in that thread - don't start a new thread for the same question.

I am closing this thread.