**Bar Charts**and

**Pie Charts**.

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## Self-Directed Learning (I)

## when we meet... in Term 3

## Term 3 Week 3 Maths Test

## Topics

## Announcement: Self-Directed Learning Modules

## Useful Links

## Maths - General Links

## Resources and Video Clips about NUMBERS

*Source: Teacher.TV (**http://www.teachers.tv/**)*

**Safety In Numbers** Mathematician Marcus du Sautoy reveals how the language of maths is used to construct the complex codes that we encounter in everyday life. Learn about the amazing use of PRIME NUMBERS in our everyday life.

(http://www.teachers.tv/video/3501)

**Zero to Infinity **In this programme, mathematician Marcus du Sautoy explains how humans have developed numbers for their mathematical needs. Hear about the Invention of **Zero** and have a better understanding of **Infinity**. Can we divide a number by Zero? Is *Infinity* the biggest number? (http://www.teachers.tv/video/3500)

*Source: The Guardian (Guardian.co.uk), 4 March 2005 *

Article:**The Magic Number** by Simon Singh

Found!!! The biggest**Prime Number** yet...

Click HERE to read article.

## Resources and Video Clips about FRACTIONS

*Source: Teacher.TV (**http://www.teachers.tv/**)*

**Cutting a Cake** Have you wondered how to divide a cake into 12 pieces using only 4 cuts?

(http://www.teachers.tv/video/43462)

Source: Teacher.TV (http://www.teachers.tv/)

**Putting Reciprocals into Practical Use** Reciprocals help us to order "difficult" fractions! (http://www.teachers.tv/video/43452)

## Resources and Video Clips about GEOMETRY

## Video Clips about Data Handling

## Co-Authors

Year 2010

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ODD week

Tuesday 0800-0900

Thursday 0900-1000

Friday 0900-1000

EVEN week

Tuesday 1430-1530

Thursday 0800-0900

Friday 1030-1130

Tuesday 0800-0900

Thursday 0900-1000

Friday 0900-1000

EVEN week

Tuesday 1430-1530

Thursday 0800-0900

Friday 1030-1130

The following topics will be covered in the Maths Test

Chapter 4: Introduction to Algebra

Chapter 5: Algebraic Manipulation

Chapter 9: Ratio, Rate and Speed

Chapter 16: Data Handling (including Mean, Median, Mode)

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This term, we have earmarked 2 sub-topics for you to learn on your own... own time own target (to be completed by Term 1 Week 9).

**Chapter 9.2: Average Speed **

You are expected to complete sub-topic by 15 May 2010. A Pop-Quiz has been scheduled on 18 May 2010 (Tuesday).

**Chapter 9.3: Speed**

Apart from textbook and workbook, recommended resources and learning activities will be delivered through the AceLearning Portal and the Maths Blog.

**As these 2 sub-topics are not going to be covered in the class, please check/clarify with Ms Loh (Face-to-face or virtually) when you are in-doubt.**

You are expected to complete sub-topic by 15 May 2010. A Pop-Quiz has been scheduled on 18 May 2010 (Tuesday).

Apart from textbook and workbook, recommended resources and learning activities will be delivered through the AceLearning Portal and the Maths Blog.

(http://www.teachers.tv/video/3501)

Article:

Found!!! The biggest

Click HERE to read article.

(http://www.teachers.tv/video/43462)

Source: Teacher.TV (http://www.teachers.tv/)

Source: Teacher.TV (http://www.teachers.tv/)

**Seaside Triangles** - How properties of triangles become useful in real world applications.

(http://www.teachers.tv/video/37910)

**Surface Area of an Octagon** - Step-by-step process of working out the area of an octagon

(http://www.teachers.tv/video/43382)

(http://www.teachers.tv/video/37910)

(http://www.teachers.tv/video/43382)

This video clip, Statistics: Decisions Through Data shows how data (in the study of Statistics) has enabled mankind to make big and small decisions, that either impact the individuals or the bigger community.

Look out for the following segments:

- Describing Data

- Producing Data

- Conclusions from Data

~~~~~~~~~~~~~~~~~~~~~~~~~~

Watch this video clip The Business of Farming

*Source: The Futures Channel (**http://www.thefutureschannel.com/index.php**)*. Note: It may take a while to stream the video clip

*This video about...* There are more than 350 different commodities grown in California. In a state that provides approximately 15 percent of U.S. agricultural products, statistics are an important tool for agricultural economists to keep up with supply and demand. Let's hear how the statistics help farmers to make decisions!

Look out for the following segments:

- Describing Data

- Producing Data

- Conclusions from Data

~~~~~~~~~~~~~~~~~~~~~~~~~~

Watch this video clip The Business of Farming

7.35 am

ReplyDeleteBar chart. It is easier and quicker for us to compare the numbers by looking at the length.

a. 7.35 am

ReplyDeleteb. Bar chart. It represents data in a way that immediately after seeing it, you have a rough idea of what is the quantity of the items whereas for a pie chart, you need to count the numbers individually before knowing the quantity of the iems.

i) 1+1+2+14 = 18

ReplyDelete33+3+1+7+4=48

Ans= 7.35 am

ii) Bar chart as it shows which bar is longer and it is easier to see the which is more congested.

7.35a.m.

ReplyDeleteBar Chart. As the pie chart always present 100%, the number of vehicles does not matter. To see the difference in the number of cars, I can see it at a glance from the bar chart.

1. 7.35 am

ReplyDelete2. Using a bar graph is better as it is clearer to see the total number of vehicles more clearly. In a pie chart, 1/4 can mean any digit. 1/4 in one pie chart can be compared as 1/2 in another, so it is hard to visualize the information.

7.35am.

ReplyDeleteBar Chart. It displays the data clearly.

When using a Pie Chart, it is not as clear as all the numbers will always form a pie not matter how big.

This comment has been removed by the author.

ReplyDelete7.35am

ReplyDeleteBar Chart. The information is neater and more organised so it will be easier to count the number of vehicles.

7.35am

ReplyDeleteBar chart as the pie chart will just present 100% no matter of the number of cars. It is easier to know the number of vehicles by just looking at the length.

7.35 am

ReplyDeleteBar chart since the number of vehicles is easy to compare this making it easier to do the task

7.35 am

ReplyDeleteBar Chart. It can also show the timing of when the vehicle passed, and it is also easier for me to compare.

7.35am

ReplyDeletebar chart.

The bar chart shows significant differences but the pie chart only show the difference in angles, which is harder to see without the numbers there.

-7.35 am

ReplyDelete-Both ways are good for informing us what time the road is more congested but bar graph would be clearer and easier to see which time the road is more congested.

The road is more congested on 7.35am. I think Bar Charts would be a more appropriate source to inform us the above at what time the road is more congested; this may be due to a clearer presentation to compare and contrast the data.

ReplyDelete- The road is more congested at 7.25 am

ReplyDelete- Bar chart, because we can see the difference of length of the bar charts easily. The pie chart is in a fixed size, thus they only can represent the difference by stating the number in the area of the chart. Because of that, i think that the bar chart is more suitable to inform us at what time the road is more congested.

(a) 7.35am

ReplyDelete(b) The bar chart would be more appropriate, as the number of vehicles can be seen more clearly from the bar chart, while the pie chart shows a whole pie and the total number of vehicles must be calculated before the results can be shown. However, through the length of the vars in the bar charts, it is obvious at what time the roads are more congested.

7.35am

ReplyDeleteI think Bar Chart is better than Pie Chart because the data is displayed more organised in the Bar Chart and that enables us to be able to see the difference between the number of cars at 7.05am and 7.35am immediately.

a) 7.35 am

ReplyDeleteb) Bar chart. It is easier to compare the numbers between the different vehicles in a bar chart.

a. 7.35am

ReplyDeleteb. Bar chart. It is easier for us to compare and analyze.

(a) 7.35 pm

ReplyDelete(b) Bar chart. It is easier for us to indicate what time is more congested.

7.35 am

ReplyDeletebar graph as pie charts are according to 100% and it does not indicate the number of vehicles.the bar graph shows the numbers more clearly

To all:

ReplyDeleteWhile all of us agreed that bar chart is a better choice of visual representation, how would the PIE Chart be helpful to us? What kind of information does the pie chart provide?

7.35 am

ReplyDeleteThe bar graph is easier to use

The pie chart can help us when the number of vehicles for both timing is the same

pie chart enables us to calculate percentage or fraction easier as the numbers are already written. as for the bar chart, we still have to relate the tip of the bar to the numbers provided. (very 麻烦 lor haha)

ReplyDeleteWhen given 2 pie charts that present the types of vehicles at different timing, how is this information going to be useful?

ReplyDelete