Step through the Chart Wizard, asking pupils questions at each stage.

Use the preview feature to discuss types of graph.

Ask: Is this the sort of graph we want? What is wrong with this graph?

Select other types of graph and ask the same questions.

Line graph with markers is almost correct but the line is too crowded.

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

Move through the next stage explaining that it provides a check on the correct set of data.

Select Series in: Rows and discuss the effect this has on the graph. [Unable to create graph]

Do not click Next.

Move to the Series tab.

The formula is put in the space and the axis is now correct.

In the Series tab. The Y axis is plotting from B2 to B602 which is correct. The X axis plot is not shown, but is starting at number 1.

To ensure it starts at 0, click on the coloured box at the side of Category (X) axis labels. Highlight your data from A2 to A602 and press enter.

In Step 3 of the Chart Wizard, demonstrate the options available. Ask pupils to suggest alternatives for the various options.

Ask pupils why labels are important.Point out that the labels appear on the thumbnail allowing a check to be made. This is useful if pupils are not secure in which axis is x and which y.

Ask pupils why gridlines are useful.

Discuss which ones to apply.

Ask pupils where to place the legend: preview and discuss.

Ask pupils if a legend is necessary in this example.

Discuss how useful data labels are.

Preview the change and discuss.

Finally, demonstrate how to place the chart on a separate worksheet by selecting a new worksheet from the drop down menu.

Explain that this is useful in this case because they are now going to annotate it and they will need to have the graph as large as possible.

The finished graph should look something like this.

Demonstrate how to enlarge it.

Discuss with pupils the scale of the axes. Ask if these are appropriate.

Demonstrate how to alter the axis scale by right clicking on the axis.

Ask pupils which values they would wish to change and why.