1. 11.1 Ratio and Proportion Objectives: 1.Review ratios 2.Write proportions 3.Solve proportions 4.Use proportions in real life Vocabulary: proportions

2. Ratios: 2 to 3 2:3 2/3

3. Proportions: an equation of 2 ratios Read: “2 is to 3 as 4 is to 6” Read:

4. Reciprocal Property: If two ratios are equal, then their reciprocals are equal. Apply the reciprocal property to:

5. Cross Product Property: The product of the extremes equals the product of the means. Apply the cross product property to:

6. Solve the proportions:

10. Students submitted plans for a statue of Mr. Pelzer to put in front of the school. This was the winning design. If the model is a 2”:13’ ratio, how tall is the statue if the model’s height if 15”? 97.5’ How long is the model of the calculator if the statue’s calculator is 18’? 2.77”

11. You are building a scale model of hyou uncles’ fishing boat. The boat is 62 ft long and 23 ft wide. The model will be 14 in long. How side should it be? h = 5.2 in The mast of your uncles fishing boat is 30 ft tall. How tall should the mast be on the model? h = 6.8 in

12. Algebra 1 Assignment: 11.1 p646 #17-39 odd, 41, 42, 47 Progress Report signature Outside show is a poor substitute for inner worth. Aesop