PLEASE HELP ME! When plotting these points, what type of function best fits the graph?

Question

plot these points either by hand or on graphing calculator, and tell me what type of function best fits the data. PLEASE HELP!
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

Answer 1

-0.00407^3+0.15356X^2+(-1.27574)X+18.27288



a CUBIC regulation



sry thats what i ment. :]

Answer 2

On the X axis take the scale as 1 unit = 1 cm and begin marking upto 20 and on the y axis too take the same scale but start the y axis from 15

Answer 3

in many cases, graphing purposes is a manner of examining the behaviors of the function because of fact the self reliant variable adjustments. the main elementary self reliant variable in genuine existence purposes is time. working example,In physics, you could hit upon action via graphing distance over the years. an exciting application to your scholars might desire to be to look on the graph of the unfold of a virulent disease. whilst genuine existence documents could be approximated with algebraic purposes, you benefit the potential of prediction. working example, you could desire to anticipate the style of a undeniable species of animal on the endangered species checklist in case you slot a function to the documents gathered so far. it fairly is terrific initially linear purposes whilst introducing purposes. inspect NCTM Illuminations for some lesson techniques.