Answer:
D) is the correct answer
Step-by-step explanation:
To define a function, so one x can only corresponding to one y.
Then for A) we have x = -5, but y can be 1 and 4, so it is to a function,
for B) x =1, y = -1 or -4, so not. For C) x =0, y = -3 or 0, so wrong. Then left with D) which each x only corresponding to one y, so D) is correct.
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