Ratio, Rates, and Proportion     Lesson 6-1 Ratios Lesson 6-2 Equal Ratios Lesson 6-3 Rates and Unit Rates Lesson 6-5 Understanding Proportions Lesson 6-6 Solving Proportions Lesson 6-7 Solving Proportions Using Cross Products Lesson 6-9 Using Formulas Lesson 6-10 Scale Drawings and Maps