Question: The bar graph represents the rainfall in a city from October to December. Find the range of the data.
A ) 5 B ) 14 C ) 20 D ) 4
Steps to derive
1 The height of each bar in the graph represents the rainfall in the corresponding month.
2 The range of the data is the difference between the maximum and the minimum values.
3 From the graph, the rainfall in November was 14 cm, which was the maximum and the rainfall in December was 10 cm, which was the minimum. [The height of the bar in November is the highest and the height of bar in December is the least.]
4 So, the range of the data = maximum - minimum = 14 - 10 = 4
