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Distinguish Examples, Nonexamples, and Counterexamples
Grade Level
Praxis Core
5165.277 Distinguish Examples, Nonexamples, and Counterexamples
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The identity function on the real numbers maps every input to itself. Which choice is a nonexample of the identity function on R?
A
f(x) = ∣x∣
B
A table in which −2 maps to −2, 0 maps to 0, and 5 maps to 5
C
A rule that sends every real number t to t
D
f(x) = x
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