A concise teacher answer key for the revised 5-page Independent Review Worksheet, providing clear answers for Units 7.8, 8.1, 8.2, and 8.3. Revised for maximum legibility and standalone reference. Fixed missing y-values and redundant text. Added problem context labels. Added second equation for modeling. Fixed splitting of algebraic steps. Corrected Tuesday problem 4 values for integer result. Fixed Monday header isolation.