Answer:
D. on the number line, move 6 units to the left. End at -9, the Dolphin was 9 feet below sea level
D move 6 units to the left and land on -9
Explanation:
The dolphin dove down meaning that it went 6 feet below sea level. that would mean -6. If you move 6 spaces to the left, you would land on -9. Hope this helps
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