1. B’ (-18, 20) A’ (-21, 4) T’ (13, -11) Translate (x – 9, y + 8)
Warm up
Translate (x – 9, y + 8)
B (-9, 12)
A (-12, -4)
T (22, -19)
B’ (-18, 20)
A’ (-21, 4)
T’ (13, -11)

2. Interactive Notebook
P 35 MCC912.A.REI.5
Prove that, given a system of two equations in two variables, replacing one equation by the sum of that equation and a multiple of the other produces a system with the same solutions.

3. Interactive Notebook
P 37 MCC912.A.REI.8
Solve systems of linear equations exactly and approximately (e.g., with graphs), focusing on pairs of linear equations in two variables.

4. EOCT

5. EOCT

6. EOCT

7. EOCT

8. EOCT

9. EOCT

10. Reflections

11. Reflect across the x-axis
Change the sign of the y-value

12. Reflect across the x-axis

13. Reflect across the y-axis
Change the sign of the x-value

14. Reflect across the y-axis

15. Reflect across y = x
Swap x and y

16. Reflect across y = x

17. Reflect across y = -x
Swap and change both signs

18. Reflect across y = -x

19. Lines of Symmetry
How many lines of symmetry does the polygon have? 3

20. Lines of Symmetry
How many lines of symmetry does the shape have? 2

21. Lines of Symmetry
How many lines of symmetry does the shape have? 5