input: Write a python function to plot a line chart using matplotlib for a given list of numbers.
  assert plot_line_chart([1,2,3,4,5]) is None
  assert plot_line_chart([10,20,30,40,50]) is None
  assert plot_line_chart([3,6,9,12,15]) is None
output: def plot_line_chart(numbers):
      import matplotlib.pyplot as plt
      
      plt.plot(numbers)
      plt.ylabel('Values')
      plt.xlabel('Index')
      plt.title('Line Chart')
      plt.show()