Question

A data set is shown below.

x y
1 6.00
2 5.04
3 4.23
4 3.56
5 2.99
6 2.51
7 2.11



Using an exponential best-fit model, what is the residual when x = 1. Round your answer to the nearest hundredth.

This is the problem i dont understand line of best fit i dont get at all