College Algebra / Unit 5 Alg 256 short lesson, about 20 seconds
The Absolute Value Function
Captions available
The idea
The absolute value function is piecewise: f(x) = x for x ≥ 0 and −x for x < 0; its graph is a V cornered at the origin.
In practice
At x = −3, the second rule fires: f(−3) = −(−3) = 3 — the opposite of a negative input, which is the distance.
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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