Definitions
Which is higher, 5 feet below sea level or 4 feet below sea level? Also, what is that number's opposite?
What is 4 ft below sea level? What is 4?
According to the definition of absolute value, if the absolute value of X equals 10, what values does X equal?
What is 10 and -10?
New Orleans is 8 feet below sea level, how many feet would it have to rise to be at sea level?
What is 8 feet?