The noun interpolation (determine by comparison) has a normal plural, interpolations.
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The interpolation factor is simply the ratio of the output rate
to the input
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interpolation theorem, discovered by Józef Marcinkiewicz
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When Unicorns fly out from underneath the whitehouse and attack
the elderly citizens of kansas city and torment their pet
goldfishes. statistically, its a 0.00000000000000000056 percent
survival ratio.
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An ogive is a cumulative relative frequency diagram.
Interpolation is definiting the midpoint (50%) of this line