Week 9&10

SUBJECT: MATHEMATICS

CLASS: PRIMARY 4

TERM: 3RD TERM

TOPIC: Pictogram and mode

SUBTOPIC: Bar gragh and mode

BEHAVIOURAL OBJECTIVES: At the end of the lesson, pupils should be able to:

Represent data on a pictogram.
Determine the mode from the pictogram
Read and interpret bar graph
Determine the mode from bar gragh
Appreciate the presence of most common events/data in daily activities.

CONTENT

Number of red colored boxes sold by William, a shopkeeper, in six days of a week. See the picture graph or pictograph to answer the questions.

Examples of Pictographs

Information gathered from the above table:(i) Number of red boxes sold:

Monday – 4, Tuesday – 2, Wednesday – 3, Thursday – 5, Friday – 8, Saturday – 1

Therefore, sale during the week = 23

(ii) Lowest sale – on Saturday, only 1 box was sold.

Maximum sale on Friday is 8 boxes were sold.

We can easily get more information by observing this picture-graph.

Number of illiterate children of 5 small towns, Melrose, Marengo, Midway, Parral and Rushville. See the picture graph or pictograph to answer the questions.

Information gathered from the above table:

(i) Number of illiterate children of different small towns:

Melrose - 5, Marengo - 4, Midway - 7, Parral - 3 and Rushville - 2

(ii) Total number of illiterate = 21

Information about 300 children of a school who come to school by different modes of transportation.

Pictographs Face

→ 1 face represents 10 children

See the picture graph or pictograph to answer the questions.

Picture Graph or Pictograph

Information gathered from the above table:

(i) Number of students going to school by different modes of transportation:

Auto-rickshaw = 6 × 10 = 60, Car = 4 × 10 = 40, Bicycle = 7 × 10 = 70, Bus = 10 × 10 = 100, On foot = 3 × 10 = 30

(ii) Total number = 60 + 40 + 70 + 100 + 30 = 300

A BAR GRAPH

A bar graph (bar chart) is presented in rectangular form

having horizontal and vertical axes as shown opposite:

Examples

Table: Favorite Type of Movie

Comedy Action Romance Drama SciFi

4 5 6 1 4

We can show that on a bar graph like this:

Favorite Type of Movie

It is a really good way to show relative sizes: we can see which types of movie are most liked, and which are least liked, at a glance.

We can use bar graphs to show the relative sizes of many things, such as what type of car people have, how many customers a shop has on different days and so on.

Example: Nicest Fruit

A survey of 145 people asked them "Which is the nicest fruit?":

Fruit: Apple Orange Banana Kiwifruit Blueberry Grapes

People: 35 30 10 25 40 5

And here is the bar graph:

bar graph for fruit

That group of people think Blueberries are the nicest.

Bar Graphs can also be Horizontal, like this:

bar graph horizontal

Example: Student Grades

In a recent test, this many students got these grades:

Grade: A B C D

Students: 4 12 10 2

And here is the bar graph:

Exercise 1.

Umoh and Rashid were recordin g the types of vehicle passing their school gate during

lunch break and produced the table below.

Type of vehicle Bicycle Motorbike Car Lorry

Number 4 10 25 16

Draw a bar chart to show the information.

The table below shows the rainfall recorded in one week

Day Sun Mon Tue Wed Thur Fri Sat

Rainfall per week (mm) 40 35 20 30 25 15 15

Draw a bar graph to show the information.

257

The number of litres of kerosene consumed by housewives in a group of 55 houses are

shown in the table.

Number of litres 1 2 3 4 5 6

Number of houses 11 16 12 5 8 3

Draw a bar graph to show the information.

The table below shows the responses of pupil’s opinions about the quality of school

lunches.

Opinion Very good Good Okay Poor Very poor

Number of Pupils 2 12 20 10 8

Draw a bar graph to show the information

Lesson Notes By Weeks and Term - Primary 4