I am given a table of values

x | y

------

-3|91

-2| 21

-1|3

0 |1

1 |3

2 |21

3 |91

I have found the value of 4th Difference: 24, but I don't know how to to determine an equation for Quartic p01yn0mial function represented by the table of values above..

Original question: Determine equati0n f0r Quartic p0lyn0mial functi0n represented by table of value.

Any solution help would be great! Thanks in advance!