The true statement about absolute value is:
The absolute value of a number is equal to its distance from zero.
The other statements are false. Specifically:
- A negative number has a positive absolute value.
- Two different numbers can have the same absolute value (for example, -3 and 3 both have an absolute value of 3).
- The absolute value of a number is shown by enclosing the number in vertical bars, such as |8|, not curly brackets.