Ratios and RateSection 7.1

2

4

5Side Length

2 4 5

Perimeter

Side Length Perimeter

Looking at the table we just completed. What did we create between the length of a side and the perimeter?

Ratio: A comparison of two numbers using division

Baseball Wins

Phillies 23Yankees 14

What is the ratio between win by Phils and Yanks?

Example 1: A ski resort has 15 easy, 25 intermediate, 7 difficult, and 11 expert trails.

Write the ratio "intermediate trails: easy trails" in three ways.

Rate: is a ratio of two quantities that have different units.

Think to yourself what are some rates you have experienced or used.

Finding an equivalent rate:

Lightning strikes about 100 time per second around the world. About how many times does lightning strike per minute around the world?

A water pump moves 2 gallons of water per second. How many gallons of water are pumped per minute? Write your answer as a rate.

Unit Rate: rate that has a denominator of 1 unit.

1. Write -24 ft per 5 sec as a unit rate. 2. Linzell scored 114 points over 6 games. Put in unit rate.3. Mike's restaurant served 365 people over 5 days. How many people per day.4. Omaris's care drives 329 miles using only 10 gallons of gas.