input: Write a python function to plot a graph for given x and y data with labels for x and y axes and a title.
  assert plot_graph([1, 2, 3], [10, 15, 13]) == None
  assert plot_graph([2, 4, 6], [8, 16, 12]) == None
output: def plot_graph(x, y):
      import matplotlib.pyplot as plt
  
      plt.plot(x, y)
      plt.xlabel('X Axis')
      plt.ylabel('Y Axis')
      plt.title('Graph Title')
      plt.show()