Back to Polynomial and Rational Functions

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Useful for: MCF3M IB Math AI SL & HL AP® Precalculus

Learn it From a table with equal x-steps: constant first differences → linear; constant second differences → quadratic; constant ratios (each y ÷ previous y) → exponential.

Example: y: 3, 6, 12, 24, 48.

Differences 3, 6, 12, 24: not constant.
Ratios: all 2. Exponential.

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