Work through the levels in order. Type your answer and press Check — open the worked solution if you get stuck. Answers like -6, 3/4 or 0.25 are typed exactly as shown. A ⭐ Bonus Challenge at the end is extra credit — skip it if the rest was hard work.
Level 1 · Warm-up
1 Would you draw a column graph or a line graph for the favourite sport of your class?
Show worked solution
A column graph — the data is categorical.
2 Do the columns on a column graph have gaps between them?
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Yes — the categories are separate groups.
3 A picture graph key says one symbol stands for 2 books. A row shows 4 symbols. How many books is that?
Show worked solution
4 × 2 = 8 books.
Level 2 · Core
4 Which display best shows how a plant's height changes week by week?
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A line graph — it shows the trend over time.
5 A dot plot has 3 dots above 0, 6 above 1, 4 above 2, 1 above 3 and 1 above 4. How many values are in the data?
Show worked solution
3 + 6 + 4 + 1 + 1 = 15 values.
6 Besides the bars themselves, which two things does every graph need?
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A title and labelled axes. Add a key as well if the graph uses symbols.
Level 3 · Challenge
7 Where must the frequency scale on a column graph start?
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At 0 — otherwise the differences between columns are exaggerated.
8 Why is a dot plot a poor choice for a set of 200 values?
Show worked solution
It would need 200 dots and become unreadable. Dot plots are for small data sets.
9 You want to show how many books were borrowed on each day of a week and see the trend. Which display?
Show worked solution
A line graph — the bottom axis is time, so the points can be joined to show the trend.