**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

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