import numpy as np, matplotlib.pyplot as plt
from numpy import exp
from eksamensoving import til_intervall

f = lambda x: exp(-3*x)

x_line = np.array([np.linspace(i-11,i-9.1,20) for i in range(0,22,2)])

func = np.vectorize(f)

y = [func(til_intervall(x,start=-1,stop=1)) for x in x_line]

for i in range(len(x_line)):
    plt.plot(x_line[i], y[i], color = 'b')


plt.xlim(-3,3)
plt.show()