2 16.4

3 15.7

4 15.3

5 15.2

6 15.21

7 15.4

8 15.8

9 16.3

10 16.8

11 17.5

12 18.18

13 18.7

14 19.36

15 19.88

16 20.4

17 20.85

18 21.22

19 21.6

20 21.65

I was told find the line of best fit for the above data chart, now I know it is a Quartic functionax^4+bx^3+cx^2+dx+e,and I know how to get the variablesa,b,c,d, and eon my calculator but I have no idea how to algerbraically could Thanks.