Respuesta :

Answer:

D

Step-by-step explanation:

Just look for a pattern.

distance from -3 to 6 is 9

distance from 6 to 15 is 9

distance from 15 to 24 is 9

They're just adding 9 each time

24 plus 9 is 33

33 plus 9 is 42

42 plus 9 is 51

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