# 2TH §2.3 Freq.table, barchart, freq.polygon

Plan for today

• Entry ticket
• §2.3 Frequency table, Bar chart, frequency polygon
• Homework: Exercises 17, 18, 19 (page 57-58)

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Slide 1: Tekstslide
WiskundeMiddelbare schoolhavo, vwoLeerjaar 2

In deze les zitten 11 slides, met interactieve quiz en tekstslides.

Lesduur is: 50 min

## Onderdelen in deze les

Plan for today

• Entry ticket
• §2.3 Frequency table, Bar chart, frequency polygon
• Homework: Exercises 17, 18, 19 (page 57-58)

#### Slide 1 -Tekstslide

Learning goals

• you will learn what a frequency table is
• you will learn what a bar chart and a frequency polygon are

#### Slide 2 -Tekstslide

Entry ticket
In a survey, 90 students are asked to name their favourite fruit.

The results you can see in the table on the right.

a) Complete the table by calculating the angle       for each fruit.

b) Draw and label the pie chart.

#### Slide 3 -Tekstslide

Complete the table and draw the pie Chart

#### Slide 4 -Open vraag

Entry ticket
In a survey, 90 students are asked to name their favourite fruit.

The results you can see in the table on the right.

a) Complete the table by calculating the angle       for each fruit.

b) Draw and label the pie chart.

#### Slide 5 -Tekstslide

§2.3 Frequency table, bar chart and frequency polygon

#### Slide 6 -Tekstslide

Frequency
The frequency is the number of times a value appears.

Look at our previous pie chart. 90 students and their favourite fruit.
This is the frequency table that goes with the information given.

#### Slide 7 -Tekstslide

Bar chart
Another diagram you can make is a bar chart. Each value gets its own bar. The height or lenght of the bar indicates the corresponding frequency.

#### Slide 8 -Tekstslide

Frequency polygon
A frequency polygon is used to show how frequency changes over time. The horizontal axis shows the time, the vertical axis shows the frequency.

Together....

#### Slide 10 -Tekstslide

Homework
• Do §2.3 Exercises 17, 18, 19 (page 57-58)