873 Math Blog (2012): Sara's Proportion Post

Wednesday, October 10, 2012

Sara's Proportion Post

Part 1

Definitions:

Ratio- is a relationship between two numbers of the same kind

examples:

example: the ratio of red total tiles is 6:12 or 6 to 12. The ratio in lowest terms is 1:2 or 1 to 2. One out of every two tiles is red.

Rate- compares two quantities measures in different units

examples:

example: $1.69 per 100g or $1.69/100 g is a rate for purchasing bulk food.

Proportion- a relationship that says that two ratios or two rates are equal

- can be written in fraction form

example:

Part 2

5 hours to travel 360 kilometers is about _____km/h.

2. Emma saves 28 cents of every dollar that she earns. Emma earned $75 last week. How much money did Emma save last week?

Part 3

What are the three ways you can prove that equivalent ratio statements are true?

3/4 = 12/16 or 4/9 = 16/32

4/9=16/32 are not equivalent ratio. The statement is not true.

Part 4

To learn more about Proportion here is a video I made.

Task 5
http://www.concurringopinions.com/wp-content/uploads/2011/10/CrimeInAmerica2.jpg

1.Does this seem fair?
- NO, this isn't fair

2.With what you know about proportion look and read what is in the image above. Does it seem just and fair?
- No, this is not fair to the homeless man.

3.Why have you made this choice?
- I have made this choice because, the homeless man surrendered the money and still got to prison for 15 years.While the Ex mortgage CEO who is only sentenced for 3 years for $3 billion fraud. That's why I think this is unfair and that's why I made this choice

4.What would you have done if you were the judge?
- If i were the judge, I wouldn't prison the homeless man because he surrendered the money, but yes taking money which is not yours is bad but returning it and still getting prison is not fair. If I were the judge I would just help the homeless man in a good way like giving him food so he wouldn't starve and be stealing money anymore.