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What is the vertex of f(x)=|x-2|?

Answer and explanation

Correct answer: (2,0)

The governing concept is horizontal translation of the basic absolute-value graph y=|x|. An absolute-value expression is smallest when its inside quantity is zero. Set x-2=0, which gives x=2. At that x-value, f(2)=|2-2|=0, so the vertex, or minimum point, is (2,0). Therefore option B is correct. The graph y=|x-2| is the graph of y=|x| shifted two units to the right. The point (0,0) belongs to the unshifted graph, not this one; (-2,0) would correspond to |x+2|; and (0,2) confuses the horizontal shift with a vertical value. Checking the zero inside the modulus avoids these errors.

Related tags

Relations-FunctionsAbsolute-ValueGraph-TranslationGraphs Of Standard FunctionsRelations And FunctionsMathematicsClass 11 Mcq

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