Wednesday, October 12, 2011

Joy's Proportion Post

Ratio: A relationship between two numbers of the same kind.

Rate: A comparison of two quantities measured in different units.
Car drives 3 hours and goes 300km. How far does it go in 1 hour ?

Proportion: An equation which states that two ratios (fractions) are equal.

1. 5 hours to travel 360 miles is about _____ mph
Answer: 72 miles

2. As a playground worker, if I increase the amount of apple juice I am serving at the playgroup from 25 ml to 100 ml, how much should I increase the the orange juice to, to keep the quantities in the same proportion? The orange juice is 50 ml to start with.

What are the three ways you can prove that equivalent ratio statements are true?
3/4 = 12/16 or 4/9 = 16/32

Using Proportion Video:
1. Does this seem fair?
-No it isn't
2. With what you know about proportion look and read what is in the image above. Does it seem just and fair? Why have you made this choice?
- No because the guy steal $3 billion and he only has to do 40- month sentence and the other guys stole $100 dollars and goes to jail for 15 years. So it doesn't really make since he took 100 and his going to spend 15 years in jail but the other guy stole 3 billion and just have to do 40 month sentence so it doesn't really make sense .
3. What would you have done if you were the judge?
- If I were the judge I would do it another way like the guy who stole the 3 billion goes to jail for 15 years and the other guy who stole 100 dollars would do 40- month sentence.

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