Making and customising graphs in Python

import matplotlib.pyplot as plt
import numpy as np
xpoints = np.array([1, 10])
ypoints = np.array([100, 200])
plt.plot(xpoints, ypoints)
plt.show()
plt.plot(ypoints, marker = '*', ms = 20, mec = 'firebrick', mfc = 'firebrick', linestyle = 'dotted')