College Algebra / Unit 3 Alg 167 short lesson, about 20 seconds
Absolute Value as Distance
Captions available
The idea
The expression |x − a| measures the distance between x and a on the number line; distance statements become absolute value statements.
In practice
A machined part passes when its width sits within 3 of the 7-unit target: |x − 7| ≤ 3, every acceptable width in five symbols.
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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