How to plot curved line between two points which goes close to the rest of points?

Question

My data is:

x = [0.1, 0.2, 0.5, 1.0, 2.0, 3.0, 5.0, 10.0, 20.0, 30.0, 50.0]
y = [7.5, 6.69, 5.86, 5.59, 4.82, 4.45, 4.15, 3.46, 2.58, 2.1, 1.