input: Write a function to create a data visualization dashboard in Python using Matplotlib. The function should generate a simple line plot with custom styling, including a title and axis labels.
  assert create_dashboard() is None
  assert plt.gcf().get_size_inches() == (10, 6)
  assert plt.gca().get_title() == "My Data Visualization Dashboard"
  assert plt.gca().get_xlabel() == 'X-axis'
  assert plt.gca().get_ylabel() == 'Y-axis'
output: import matplotlib.pyplot as plt
  
  def create_dashboard():
      plt.figure(figsize=(10, 6))
      plt.plot([1, 2, 3, 4], [1, 4, 9, 16], 'ro-', linewidth=2, markersize=8)
      plt.title("My Data Visualization Dashboard")
      plt.xlabel('X-axis')
      plt.ylabel('Y-axis')
      plt.show()