Multiple Bar Charts


12. The following table and bar chart show how many pens and pencils were bought each day from the school shop. To compare which were selling better on any given day, we need to put both items on the same bar chart. This is called a multiple bar chart.


Pen Pencil


20 18 16 14 12 10 8 6 4 2 0


Monday Tuesday Wednesday Thursday Friday 12 18


14 12


17 14


11 16


15 8


Monday Tuesday Wednesday Thursday Friday Pen Pencil


Monday 12 18


Tuesday 14 12


Wednesday 17 14


a) On which days were more pens than pencils sold? b) On which days were more pencils than pens sold?


c) On what day was there the greatest difference in the amount of pens and pencils sold?


d) How many pens and pencils were sold in total that week? e) Make up 3 more comparison questions based on the chart.


Thursday 11 16


Friday 15 8


192 Representing and Interpreting Data


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