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