RRPR - Rate, Ratio, and Proportional Relationships Module Overview
Rate, Ratio, and Proportional Relationships
Rates are everywhere. If you go into the grocery store, each item has a price listed on a tag on the shelf. On many tags, you will find something called the unit price of the item. The unit price is available so that shoppers can compare the prices of similar items to see which is the better buy. You can also turn on the television and hear commercials about cars advertising that they have the car or truck with the highest miles per gallon. Percents are another way of expressing a rate. Scores on a test are given in percents. These percents will tell the teacher and the student how much material is known by that student. In this unit you will learn how to compute rates, compare items using ratios, and convert percents from fractions.
Essential Questions
- What kinds of problems can I solve by using ratios?
- How can you tell if a relationship is additive?
- What is the difference between a multiplicative and an additive relationship?
- What are equivalent ratios? Can I give examples of equivalent ratios?
- What are rates? What are some examples of unit rates?
- How are ratios and rates similar and different? Can I give examples?
- What are percentages?
- What information do I get when I compare two numbers using a ratio?
Key Terms
The following key terms will help you understand the content in this module.
- Percent- A fraction or ratio in which the denominator is 100.
- Proportion- An equation that states that two ratios are equal.
- Rate- A comparison of two quantities that have different units of measure.
- Ratio- Something that compares quantities that share a fixed, multiplicative relationship.
- Rational Number- A number that can be written as a/b where a and b are integers, but b is not equal to 0.
- Unit Ratio- Ratios written as some number to 1.
- Quantity- An amount that can be counted or measured.
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