6.1 - 6.2 NOTES. 6.1 - 6.2 HW KEY. 6.3 NOTES. 6.3 HW KEY. Inequality Word Problems. Word Problems KEY. Quiz 1 REVIEW. 6 4 Part 1 KEY. 6 4 Part 2 KEY. 6 1 6 4 Review. 6 5 NOTES. 6 5 Part 1 KEY. Word Problems EXTRA Practice. Word Problems EXTRA Practice KEY. Unit 2 Review. Ch 6 Review. Unit 2 Practice Test. Unit 2 Practice Test (part 1) Unit 2 Practice Test (part 2) Unit 2 Practice Test Extra.