This is a relatively difficult question. This question was above the expected minimum level of numeracy performance for year six students and substantially above the minimum expected performance for year four students.
Only high performing year six students and very high performing year four students were expected to answer this correctly. Only 16% of year four students and 16% of year six students correctly answered this question.
4% of year four students and 6% of year six students were able to partly solve the problem: they correctly described the difference but did not give the number (for example, writing that one value is higher than the other).
There may be a need to support students’ knowledge and interpretation of graphs. This question shows that many students may need support to understand the basic concepts or data being shown in various types of graphs. Others may also need support to accurately describe the information being presented.