# Population – Bar charts and pictogram

MATHEMATICS

EVERYDAY STATISTICS

TOPIC: Population

PERFORMANCE OBJECTIVES

By the end of the lesson, the pupils should have attained the following objectives (cognitive, affective and psychomotor):

1. the meaning of population;
2. interpret pictograms and bar graphs.
3. use pictograms and bar graphs in representing population of people or data.

ENTRY BEHAVIOR

The pupils are required to already learnt plane figures.

INSTRUCTIONAL MATERIALS

The teacher will teach the lesson with the aid of population data chart.

METHOD OF TEACHING

MAIN REFERENCE MATERIALS

1. Prime Mathematics book 6, page
2. New Method Mathematics book 6, page

CONTENT OF THE LESSON

LESSON

PERIOD:

DATE:

TIME:

INTRODUCTION (MEANING)

Population is the total number of people living in a particular place.

BAR GRAPH

A Bar Graph (also called Bar Chart) is a graphical display of data using bars of different heights.

Example 1

Imagine you just did a survey of your friends to find which kind of movie they liked best: Represent the information contained in the table in bar graph.

Solution This is the bar graph or column graph representing the above information. The height of each bar or column tells us the number of times that event represented by the bar occurs.

LESSON EVALUATION

A survey of 145 people asked them. “Which is the nicest fruit”. Represent the information contained in the table in bar graph.

LESSON

PERIOD:

DATE:

TIME:

Example 2

The bar graph below shows the scores of five pupils in a mathematics test. Draw up the table from which this bar graph was drawn.

Solution

The table is drawn as follows: LESSON EVALUATION

The bar graph shows the favorite colors of 20 students in a class. Draw up the table from which this bar graph was drawn.

LESSON

PERIOD:

DATE:

Time:

PICTOGRAM

A Pictograph is a way of showing data using images.

Example 1

Here is a pictograph of how many apples were sold at the local shop over 4 months: What is the total number of apples sold each month?

Solution

Note that each picture of an apple means 10 apples (and the half-apple picture means 5 apples).

So the pictograph is showing:

1. In January 10 apples were sold.
2. In February 40 apples were sold.
3. In March 25 apples were sold.
4. In April 20 apples were sold.

LESSON EVALUATION

• How many paintings did the painter sell in each month? • Represent the information contained in the table in bar graph.

LESSON

PERIOD:

DATE:

TIME:

Revision and summary of the lesson.

PRESENTATION

To deliver the lesson, the teacher adopts the following steps:

1. To introduce the lesson, the teacher revises the previous lesson. Based on this, he/she asks the pupils some questions.
2. Guides pupils to present data on a bar graph or pictogram;
3. Pupil’s Activities – present the population data in bar graph and pictogram.
4. Pupil’s Activities – represent a given population data on a bar graph or pictogram.

CONCLUSION

To conclude the lesson for the week, the teacher revises the entire lesson and links it to the following week’s lesson.

LESSON EVALUATION

Pupils to prepare a given population data on pictogram or bar graph.