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Question

Question
The table shows the elevation of a dolphin relative to sea level at the end of each minute as it swims, sometimes jumping out of the water. Distances above sea level are positive values, and distances below sea level are negative values.


Time Elevation
Minute 1 5 feet above
Minute 2 7 feet below
Minute 3 4 feet above
Minute 4 7 feet below
Minute 5 4 feet below
Which two lines in the table combine to create an elevation of 0?

Answer 1

The two lines that combine to create an elevation of 0 are:

- Minute 2: 7 feet below sea level
- Minute 3: 4 feet above sea level

Adding the negative value of 7 feet below to the positive value of 4 feet above will result in an elevation of 0.