The document discusses absolute value and defines it as the distance of a number from zero on the number line, without regard to its direction. It provides examples of finding the absolute value of numbers algebraically and using a number line. These include the absolute values of 3, 0, -5, 7, 5, 9, 4, -4, -1, 24, 36, -8, -6, and 10. Practice problems are provided to find the absolute value of numbers using a number line.