ACT Preparation / Unit 12 ACT 1105 short lesson, about 20 seconds
Linear or Exponential
Captions available
The idea
Over equal steps in x, a linear function adds a constant difference, while an exponential function multiplies by a constant ratio.
In practice
3, 7, 11, 15 adds 4 each step: linear. 3, 6, 12, 24 doubles each step: exponential.
Where people slip
This rule rests on the anchor alone in this course; no witness states it as a table test. Check differences first, then ratios.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Builds on
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