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. "Mystery Graphs." Measuring Up: Prototypes for Mathematics Assessment. Washington, DC: The National Academies Press, 1993.
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Name _________________________________________ Date ______________
Look at the five graphs on the next pages. Each graph shows something about a classroom of fourth graders.
Which of the five graphs do you think shows:
The number of cavities that the fourth graders have?
The ages of the fourth graders' mothers?
The heights of the fourth graders, in inches?
The number of people in the fourth graders' families?
Explain why you think the graph you picked for c is the one that shows the heights of fourth graders.
Why do you think the other graphs don't show the fourth graders' heights?