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ACT Preparation / Unit 19   ACT 1814 short lesson, about 20 seconds

Extrapolation in Data

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The idea

Extrapolating means extending a trend beyond the measured range. It is less certain than interpolation, because the trend may change outside the data.

In practice

An invented plant growing 3 centimeters a day reached 18 on day 6, suggesting about 24 on day 8, if growth continues.

Where people slip

An extrapolated answer carries a condition: if the trend continues.

Your place on the trail

Every lesson rests on earlier ones and opens later ones. Tap any to jump.

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