1. Why do people often present data in a chart instead of a long table of values?
A chart lets the reader type new values in more quickly
A chart automatically works out the totals and averages for the reader
A chart stores the values in a more reliable way than a table
A chart shows the data as a picture, making it easier to compare
2. A column chart shows how many books each year group read. The columns are labelled and the scale is clear, but readers cannot tell what the chart is about. What is missing?
A second vertical axis with different units
A key explaining what each colour means
A note saying where the data came from
A title