Graph of inverse of mean against frequency

Step 1: Identify the data points for plotting.
The graph is of inverse of mean against frequency. This means frequency ($f$) will be on the x-axis and inverse of mean length ($1/m$) will be on the y-axis. We will use the values provided in the table for plotting.

The data points $(f, 1/m)$ are:

• Point 1: $(288 \text{ Hz}, 2.86 \text{ m}^{-1})$
• Point 2: $(320 \text{ Hz}, 2.94 \text{ m}^{-1})$
• Point 3: $(384 \text{ Hz}, 2.94 \text{ m}^{-1})$