How many solutions does the system have?

Compare the slopes and intercepts. Different slopes give one solution. Same slope and same intercept give infinitely many. Same slope and different intercepts give none.

1. How many solutions does the system y = −3x + 9 and y = −3x + 8 have? Write one, none or infinite.
2. How many solutions does the system y = −3x + 4 and y = 3x have? Write one, none or infinite.
3. How many solutions does the system y = 4x + 6 and y = 4x + 10 have? Write one, none or infinite.
4. How many solutions does the system y = −4x − 2 and y = −4x − 2 have? Write one, none or infinite.
5. How many solutions does the system y = 6x − 9 and y = 6x − 11 have? Write one, none or infinite.
6. How many solutions does the system y = −4x + 6 and y = −4x + 2 have? Write one, none or infinite.
7. How many solutions does the system y = −2x − 9 and y = −2x − 9 have? Write one, none or infinite.
8. How many solutions does the system y = −x + 5 and y = −7x − 4 have? Write one, none or infinite.
9. How many solutions does the system y = −10x + 11 and y = −10x + 14 have? Write one, none or infinite.
10. How many solutions does the system y = −10x − 4 and y = −10x − 2 have? Write one, none or infinite.
11. How many solutions does the system y = x − 7 and y = −5x + 13 have? Write one, none or infinite.
12. How many solutions does the system y = 8x − 7 and y = −x − 7 have? Write one, none or infinite.
13. How many solutions does the system y = 9x − 7 and y = 9x − 7 have? Write one, none or infinite.
14. How many solutions does the system y = −4x − 2 and y = 4x − 10 have? Write one, none or infinite.
15. How many solutions does the system y = 10x and y = 10x have? Write one, none or infinite.
16. How many solutions does the system y = −2x − 19 and y = −2x − 21 have? Write one, none or infinite.
17. How many solutions does the system y = −13x + 10 and y = −13x + 7 have? Write one, none or infinite.
18. How many solutions does the system y = 8x + 4 and y = 8x + 4 have? Write one, none or infinite.
19. How many solutions does the system y = 10x − 22 and y = −2x − 23 have? Write one, none or infinite.
20. How many solutions does the system y = −12x − 30 and y = 8x + 29 have? Write one, none or infinite.