import matplotlib.pyplot as plt
year=[1950,1970,1990,2010]
pop=[2.159,3.692,5.263,6.972]
plt.plot(year,pop)
plt.show()
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import matplotlib.pyplot as plt
year=[1950,1970,1990,2010]
pop=[2.159,3.692,5.263,6.972]
plt.plot(year,pop)
plt.show()
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