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One mark for cycle, one for bus, one for walk. That list of marks is a tally. It shows the answers quickly.

This is Chapter 4, Data Handling and Presentation, in your book.

What you will learn

• What is data — collected facts, not a guess.
• Tally marks — one stroke each time, in groups of five.
• Pictographs — a picture means a number. The key, a note beside the graph, says which number. Check it first.
• Bar graphs — a bar's length shows a count. The scale says how much one square counts for. Check it first.
• Reading graphs — find answers in a graph.
• Choosing — pick the chart that fits your data.