1. Section 4-1 p. 156 Goal – to express ratios as fractions - to determine unit rates

2. Ratio A ratio is a comparison of two numbers by division. Lets write the ratio of boys to girls in this class.

3. Your turn 13 red pens out of 25 pens

4. Rate A rate is a special kind of ratio, a comparison of two quantities with different types of units. 130 miles in 2 hours $5 for 3 pounds

5. Unit Rate A unit rate is a rate simplified so it has a denominator of 1. 130 miles in 2 hours $5 for 3 pounds

6. Students Express each ratio in simplest form: 1) 12 missed days in 180 school days 2) 24 pints : 1 quart 3) $50 for 4 days of work 4) 3 feet of snow in 5 hours

7. Students Express each ratio in simplest form: 5) 12 blue marbles out of 18 6) 10 inches to 2 feet What is the better deal? (better buy?) 7)4 apples for $0.95 or 6 apples for $1.49?

8. Homework: p. 158 10-25