## Thursday, October 11, 2012

### Angela's Proportion Post

Definitions:
Ratio- Comparing 2 quantities that both have the same unit of measure.

Rate- Comparing 2 quantities that have different units of measure.

Proportion- An equation which shows that 2 ratios are equivalent.

Proportion Questions
1. 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?

3 ways to prove that equivalent ratio statements are true:

You could divide instead of multiply.

Their quotients should be the same.

Cross multiplication

Video

I tried making my own video, but failed miserably. This video will show how to solve a proportion using cross multiplication.

Social Justice Proportion
1. This isn't fair one bit. The judge for Roy Brown's case is horrible at his job.
2.(I honestly don't need a proportion to see how messed up this is.)

This isn't just and fair at all. Proportions are supposed to show equivalency and this isn't equal one bit.

3. I've made this choice because I think their sentence is wrong. It is not fair that Roy Brown was sentenced 15 years in jail for doing what he did. 15 years is something I'd give to serial killers. He just stole \$100, which he later gave back. The federal prosecutors gave horrible judgement to Paul. R Allen too. Justice was not served. I don't need to go to law school to know that.
4.If I was the judge I would sentence Roy Brown not guilty. I would probably buy the guy lunch.

About how tall is this traffic box?

A peach is about 6 cm tall. 10 peaches are as tall as the traffic box.  6 x 10= 60 cm. The traffic box is around 60 cm tall.