1. Find the Chart Wizard from the tool bar. Select the type of graph you need. Check it is the right one by using the preview option.

2. Line graph without markers creates the correct plot by plotting decibel readings over time.

3. Make sure you have selected the column you need to graph.

4. Add your labels. Select the gridlines you think are important.

5. Put your graph on a new sheet.

6. The finished graph should look something like this. Can you make it larger?

7. Add some useful information by adding a text box Add some useful information by adding a text box