k(s)

A = (-4.152611448672996, -67.16328340296837)
B = (-2.99334919083605, 50.99736615100539)
C = (-1.360816002371267, 116.50545633210672)
D = (0.23140772464994086, 90.83854380500853)
E = (1.2592989914611004, 37.589277517446625)
F = (2.609665949820859, 78.57971991146911)
G = (3.5670156591057625, 95.43560276508583)
H = (4.494133272307985, 63.2561900445448)
I = (5.683262384893443, 47.5495719309474)
J = (6.415355626109178, -33.56509573898797)
f = Polynomial({A, B, C, D, E, F, G, H, I, J})