A scatter plot or bubble chart uses dots ... A combination chart in Excel blends two or more chart types, such as a column and line chart, into a single visual. Its ideal for comparing datasets ...

Click Border and select Solid Line. Then choose a color for the border of the no-filled bar. Close the Format Data Series pane. Click the chart plot area and then click the Design chart tab.

Draw the graph of \(y = 3x - 1\). If you recognise this as a straight line then just choose two ‘easy’ values of \(x\), work out the corresponding values of \(y\) and plot those points.