College Algebra / Unit 1 Alg 040 short lesson, about 20 seconds
Absolute Value
Captions available
The idea
The absolute value of a real number is its distance from zero on the number line, never negative: |−4| = 4 and |4| = 4.
In practice
Distance ignores direction: −4 and 4 sit four units from zero on opposite sides, so the bars return 4 for both.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Builds on
- Nothing. This is a starting point.
Unlocks
- Nothing yet depends on this.
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