import matplotlib.pyplot as plt
x=[-4, -3, -2, -1, 0, 1, 2, 3, 4]
y=[]
for liczba in x:
y+=[liczba**2]
plt.plot(y)
plt.xlabel('X')
plt.ylabel('Y')
y1=[]
for liczba in x:
y1+=[liczba**2+1]
plt.plot(x, y1, 'ro-')
plt.show()
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