y=3.0,2.2,1.9,1.6,1.4,1.2,1.1,1.0,0.88,0.83

x= 2,3,4,5,6,7,8,9,10,11
how do you find the equation curve of best fit with these numbers

Since this is not my area of expertise, I searched Google under the key words "equation curve of best fit" to get possible sources.

In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search.