Constructing Bar Charts and Line Graphs Graphs, Charts & Tables Constructing Bar Charts and Line Graphs

The aim of this lesson is to be able to draw a bar chart and a line graph from a given set of data

A bar chart A survey was carried out to identify the types of vehicles travelling along a country lane. The results were as follows: Vehicle Car Bus Bike Lorry Tractor Number 11 4 7 6 3 We will now draw a bar chart.

Vehicle Car Bus Bike Lorry Tractor Number 11 4 7 6 3 Car Bus Bike 12 Bus 10 Number Bike 8 Lorry 6 4 Tractor 2 Vehicle

What fraction of the children chose chicken? Reading Bar Charts Pupils in a class were asked to choose their favourite kind of food. The data is shown in the table below. How many children were in the class? What fraction of the children chose chicken?

Reading Bar Charts Pupils were asked to name their favourite kind of television program. The results below were obtained. How many pupils took part in the survey? What fraction of those asked liked soaps? What fraction of those asked liked films?

Reading Bar Charts Pupils were asked to state their favourite sport. The results are shown below. How many pupils took part in the survey? What fraction of the pupils preferred Hockey? What fraction of the pupils preferred Swimming?

Reading Bar Charts Pupils were asked their favourite holiday destinations. The results are shown in the table. How many pupils chose U.S.A.? How many pupils chose Africa? How many pupils took part in the survey? What fraction of the pupils asked preferred to stay at home?

Reading Bar Charts Pupils were asked to select their favourite subject. The results obtained are shown below. From the bar chart determine:- The total number of pupils who took part in the survey? The fraction of these pupils preferring maths the most?

Reading Bar Charts The results obtained by a group of pupils in a maths test are shown. The mark is on the horizontal axis and the number of pupils obtaining that mark is on the vertical axis. How many pupils sat the test? If the test was marked out of a score of 10, do you think the test was easy or difficult? If the pass mark is 5, how many pupils passed the test?

Reading Bar Charts Pupils were asked to state the number of children in their family. The results are given in the diagram. How many children took part in the survey? Can you work out the average number of children in a family?

Can you work out the average number of hours watched per pupil? Reading Bar Charts Pupils were asked to state how many hours an evening they spent watching television. The results are shown. How many pupils took part in the survey? Can you work out the average number of hours watched per pupil?

Reading Bar Charts Pupils were asked what profession they would like to take on when they left school. The results are shown. How many pupils took part in the survey? What fraction of the pupils chose Teaching as a profession?

A line graph A weather station records daily rainfall over a period of 10 days. The results were recorded in the following table. Day Mon Tues Wed Thurs Fri Sat Sun Rainfall 4 5 2 1 7 10 12 6

Day Rainfall 4 5 2 1 7 10 12 6 M Mon Tues Wed Thurs Fri Sat Sun T W F 8 10 12 x Rainfall x x x Day

…and a final word about line graphs and trends 1 2 Graph 1 is said to show an upward trend. Graph 2 is said to show a downward trend.

The diagram shows the sales in millions of pound for two clothes stores Marks and Gap. a) Whose sales have improved in the last few years? By how many million have Marks sales fallen in the period 2001 to 2003? c) What is the difference in the sales figures for 2003?

2. The diagram shows pupil/staff absences in a large school. a) What was the total number of pupil recorded absent in the week? b) What was the total number of teachers recorded absent in the week?

The graph above shows the crime figures for a town for the year 2002 – 2003. The figures are published under the headings ‘Serious’, ‘Car’ and ‘Theft’. Use the graph to answer the questions below. In which quarter was car theft at its smallest figure? Is serious crime on the increase? Which type of crime do you feel should be a priority for the police for this town?

4. The graph shows the rainfall in millimeters for last year in the different parts of Scotland. a) Which region is the driest? b) Which region is the wettest? c) What was the total rainfall for the west for the year?

5. The views of the general public were recorded about what they watch on television. The % figures for each category are given in the table. a) Which groups most preferred watching sport? b) Which group most enjoyed watching soaps? c) Which category was the most popular?