2.3

import numpy as np
import matplotlib.pyplot as plt

k_values = [1, 2, 3, 4, 5, 6]
x = np.linspace(-10, 10, 100)

for k in k_values:
y = k * x ** 2 + 2 * k
label = f'k={k}'
plt.plot(x, y, label=label)

plt.xlabel('x')
plt.ylabel('y')
plt.legend()
plt.grid(True)
plt.show()

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