Textbook Chapter:
Mathlinks Ch. 6.2 is here (when enlarged, resolution is decent, not great):
Linear Relations 6.2 portion of Mathlinks 9-1hawpj1
Textbook Chapter Answers:
Mathlinks Textbook Answer Key ALL-1q99qx0
Answers to practice test on pg. 246:
Practice-Test-Key-pg-246-v86rof