Significant figures

In this example the response must contain the correct value to the expected number of significant figures.

Points to note

responses with too many significant figures are commented on accordingly
responses which are rounded the wrong way are identified
the graph here is drawn 'on the fly' by OpenMark
as the graph is drawn by software it is straightforward to include several variants
many students miss the power of 10 on the y axis and the response matching has been improved to comment on errors of this form