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Thursday, October 11, 2012

Mariel's Proportion Post

Part 1: Definitions & Examples

Ratio: -Part-to-part: Compares different parts of a group to each other.
          -Part-to-Whole: Compares one part of a group.

Rate: -Compares two quantities measured in different units. 

$6 per 12 cookies or $0.50 per cookie

Proportion: -A relationship that says that two ratios or two rates are equal.

Part 2: Questions...
1. 5 hours to travel 360km is about 72 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? Emma saved $21 last week.

Part 3: Equivalent Ratio Statements
Part 4: Proportion Video
Part 5: Social Justice

1.  No. 

3. It's not fair because in the first case, the person stole 3 BILLION, and only has to go to jail for 40 MONTHS. Yet, the homeless man only stole $100 and has to go to jail for 15 YEARS

4. If I were the judge, I'd give the man in the first case a life sentence to jail. And I'd give the homeless man a year sentence to jail plus community service. 


How tall is the tree on the right?

I searched up the average size of a teenage boy and got 167 cm. I measured the boy with my ruler, and he was 2 cm. Then, I measured the tree on the right with my ruler, and it was 6 cm. So if I were to make the size of the boy, and the size of a tree into a fraction, it would be 2/6 or when simplified, 1/3. Then I realized, if I would multiply the average size of a teenage boy by 3, I could get an approximate size of a real tree. If your a bit confused with all my words, here's why I'm trying to say: 

So now we have the answer, we can simplify. The average teenage boy is 1.67 meters, and the tree is approximately 5.01 meters, (I'm sorry if I got the answer wrong, or completely confused you, this is my first time trying to do this kind of proportion question.) 

The tree on the right is approximately 5.01 meters.

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