This task assesses scatter diagrams and lines of best fit.

A scatter diagram is shown of the length and width of birds eggs. There follows a series of five short tasks on:

  • Plotting an additional data point
  • Making a statement about correlation
  • Making an estimate of width from a given length
  • Describing differences between two data points
  • Interpreting information from the diagram by using ratios

This task is from the Mathematics Assessment Resource Service, a collaboration between UC Berkeley and the Shell Centre team at the University of Nottingham. A full rubric is given for the task, together with examples of student work and suggestions for helping students overcome misconceptions. Further information on the collection is given here.

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