**WEEK 9&10**

**Subject: Mathematics**

**Term: 3 ^{rd} Term**

**Class: Primary 2**

**Topic: Data collection**

A pictogram or pictograph represents the frequency of data as pictures or symbols. Each picture or symbol may represent one or more units of the data.

Example:

The following table shows the number of computers sold by a company for the months January to March. Construct a pictograph for the table.

Example:

The following pictograph shows the number of students using the various types of transport to go to school.

- A) How many students go to school by car?
- b) If the total number of students involved in the survey is 56 how many symbols must be drawn for the students walking to school?
- c) What is the percentage of students who cycle to school?

.

Solution:

- a) 20 students
- b) 56 students should be represented by 56 ÷ 4 = 14 symbols.

There are already 11 symbols on the table. So, the number of symbols to be added for ‘Walking’ is 14 – 11 = 3

a) Total profit of shop A= 20 × 4 × 0.5 = $40

b) 9 symbols must be drawn for shop C. (9 x 20 = 180)

c) Difference between shop B and shop C = 20 × 2 = 40 cans

**Exercise**

**BLOCK CHART**

Which vehicle did you see the most?

Which vehicle did you see the least?

How many more cars than lorries did you see?

How many vehicles did you see altogether

**Exercise**

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