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A single point where a rational graph is undefined, shown by an open circle, is a hole or removable:
ADistribution
BDifferential
CDiscontinuity
DDisplacement
Answer & Solution
Correct answer: C. Discontinuity
1. A factor cancels from the numerator and the denominator.
2. That leaves the function undefined at just one input.
3. The gap there is a removable discontinuity.
_Source: OpenStax Precalculus 2e, Chapter 3, Polynomial and Rational Functions._
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