How/should I display data that has different units in a chart?

1. Which graph is best for showing differences of data?
2. Which chart type can display two different data?

Which graph is best for showing differences of data?

a Bar Graph. Bar graphs are used to compare things between different groups or to track changes over time.

Which chart type can display two different data?

Different types of data, often, have different value ranges and with a Combo chart, you can include a secondary axis. Select the cells you want to chart.