Today you will

• read your bar chart and pie chart in {{code:06_ka2_charts}}
• find the biggest value, the smallest value and the shares
• write 3 or 4 sentences under each chart

This counts for your Key Assignment. If one of your charts is missing, tell your teacher now.

Warm-up

Think of a bar chart you saw lately, like a sports table. What did you notice first: the tallest bar, a colour or a label?

The four beats

• What it shows: one sentence saying what was measured.
• Biggest: the highest value, or a pie's biggest share.
• Smallest: the lowest value or share.
• Decision: one thing you will do because of the chart.

Example

Aoife makes keyrings. Her bar chart shows each item's cost. Metal blanks cost the most, at €42. Jump rings cost the least, at €4. So she will buy blanks in bigger packs.

What can a chart claim?

Place your marker on each statement in the box below. There is no right score. Be ready to say what a chart can show and what it cannot. It's fine to change your mind after you hear someone else.

Common issues

• I only wrote about colours. Use the four beats, and always end with a decision.
• I wrote "this proves customers prefer X". A cost chart doesn't measure what people like, so take that line out.
• I don't know what decision to write. Ask yourself what one thing you would change, like cutting a cost or raising a price.