d) By how much did the rainfall in December exceed that in February?


e) From the graph, can you estimate the average rainfall over these months? Check your estimate by calculating the average.


f) Which months had above average rainfall?


2. Record the temperature at midday for a week. Display your results on a trend graph.


a) Which days showed an increase in temperature? b) Which days showed a decrease in temperature? c) What was the average daily temperature for that week?


3. Here are the sales fi gures of a computer company for the last 6 months of the year. Show this information on a trend graph and write a short account of what the trend shows. Why do you think December shows a large increase in sales?


Month July Aug Sept Oct Nov Dec


Sales


€40000 €30000 €20000 €30000 €40000 €60000


4. Record the attendance of your classmates over 5 schooldays. Display your results on a trend graph.


Homework


1. This table shows the results of a survey to fi nd the favourite fruit of the children in a school. Represent the information on a bar chart. Choose an appropriate scale for the numbers.


Fruit


Number of children


Apple 45 Grapes Banana 30 40 Kiwi 25 Orange 35 Representing and Interpreting Data 1 51


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