Answer:
1. m = 2, b = 7, y = 2x + 7
2. m = -3, b = -4, y = -3x - 4
5. m = 2.5, b = 3, y = 2.5x + 3
6. m = -0.25, b = 4.5, y = -0.25x + 4.5
9. m = -2.5, b = 5, y = -2.5x + 5
