General questions/prompts:
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What do you think this graph shows us?
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What does this graph make you wonder?
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Does any part of this graph surprise you?
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How would you describe the relationship between the different variables involved?
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What title would you give this graph?
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Can you think of any further questions or future investigations? How would you go about getting the data you need for answers?
Specific questions/prompts:
Image 1: Graph showing cigarette consumption and lung cancer incidence in USA males
What are the similarities and differences between the two lines?
How big is the rightwards shift between the two lines? What does this suggest to you?
Why do you think the graph is about men only?
Why did consumption go up? Why back down?
Notice how the graph shows lung cancer deaths, not incidence. Could the reduced death rate be because less people are getting lung cancer, or because less people die when they do get it (i.e. the treatment has gotten more effective)? Does the graph make you feel one way or the other? What other data could you look for to answer the question?
Image 2: Graph showing cigarette consumption and lung cancer incidence in USA males AND females
Why do you think the female graph is different?
Why do you think most graphs of cigarette consumption and cancer deaths don't show the female graph? Is it more helpful or less helpful to include it?
Image 3: Cigarette consumption and lung cancer incidence annotated with events
Why did each event have an effect on cigarette consumption? What do you think was the most effective way of decreasing cigarette consumption?