Original
Consider the graph of {{MATH_76}} below
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Is the function {{MATH_80}} invertible at {{MATH_81}}? (That is, does {{MATH_82}} exist?)
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Is there exactly one value of {{MATH_84}} with {{MATH_85}}?
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{{CMD_89}}yes{{CMD_90}}
{{CMD_91}}no{{CMD_92}}
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{{MATH_95}}
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