Plot a graph of the inverse of mean against frequency

Step 1: Plotting the Graph

To plot the graph of the inverse of mean (interpreted as $\frac{1}{L}$) against frequency, follow these steps:

• Draw two perpendicular axes on graph paper.
• Label the horizontal axis (x-axis) as "Frequency ($F$) (Hz)" and the vertical axis (y-axis) as "$\frac{1}{L}$ (m$^{-1}$)".
• Choose appropriate scales for both axes so that all data points fit and the graph fills most of the page.
• Plot the data points from your table with Frequency on the x-axis and $\frac{1}{L}$ on the y-axis:
  • $(288, 2.86)$
  • $(320, 2.94)$
  • $(384, 3.03)$
  • $(426, 3.03)$
• Draw a straight line that best fits the plotted points. This line should pass as close as possible to all points, with roughly an equal number of points above and below it.