A graph key changes the value of a symbol
A class picture graph records votes for fruit. The key states that one complete picture represents four votes. The apple category shows three complete pictures and one half picture; the pear category shows two complete pictures. One learner counts the pictures as four and two votes. Another gives the half picture a full value. A third uses the scale, counts twelve plus two for apples and eight for pears, then compares the totals. The task asks for both category totals and how many more apple votes there are. Every required value is supplied in words, so no missing image is needed. The explanation should connect the symbol size to the stated key rather than assume that one picture always means one person.
1. What are the totals and difference?
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Apples have3×4+2=14votes. Pears have2×4=8votes. There are14−8=6moreapplevotes. The half picture represents half of four, which is two.
2. What should be checked before counting?
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Read the key and identify whether partial pictures occur. The category name alone does not establish its count; apply the same scale consistently to every shown symbol.