ACT Preparation / Unit 10 ACT 0908 short lesson, about 20 seconds
Range
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The idea
The range is the set of outputs the function actually produces. On a graph, read the domain across the x-axis and the range up the y-axis.
In practice
f(x) = x² + 1 has domain all real numbers and range y ≥ 1.
Where people slip
The range depends on the formula, not on the inputs alone: squaring never produces negatives.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Builds on
Unlocks
- Nothing yet depends on this.
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