College Algebra / Unit 5 Alg 287 short lesson, about 20 seconds
Vertical Stretches and Compressions
Captions available
The idea
A constant multiple on the output stretches the graph vertically when the constant exceeds 1 and compresses it when the constant sits between 0 and 1.
In practice
From x² to 2x², the point (1, 1) climbs to (1, 2): every output doubled, the parabola narrowed.
Where people slip
Outputs of zero stay zero under any stretch.
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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