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Answer:
No in both cases.
Step-by-step explanation:
6. y = 4x
When x = 0, y = 0, so one solution is (0, 0) not (0, 4).
9. y = x + 7
when x = 1, y = 1 + 7 = 8, so one solution is (1, 8) not (1, 6).