Interpolation and graph 

import numpy as np

from scipy import interpolate
import matplotlib.pyplot as plt

Kc=np.array([0.35,0.35,0.75,1.15,0.45])
Days=np.array([1,15,40,90,120])
f=interpolate.interp1d(Days, Kc)

print(f(20))

plt.xlabel('Days')
plt.ylabel('Kc')
plt.title("Kc vs Days")
plt.plot(Days, Kc, )
plt.show()


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