A dolphin was swimming 6 feet below sea level. The number line shows the
location of the dolphin. It then swam up 4 feet. Describe how to use the
number line to find the new location of the dolphin.
+
10 9 8 7 6 5 -3 -2 -1 0 1 2 3 4 5 6 7 8 9 10
A. On the number line, move 4 units to the right. End at 10. The
dolphin was 10 feet above sea level.
B. On the number line, move 4 units to the left. End at -10. The
dolphin was 10 feet below sea level.
C. On the number line, move 4 units to the left. End at 2. The dolphin
was 2 feet above sea level.
D. On the number line, move 4 units to the right. End at -2. The
dolphin was 2 feet below sea level.