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What is the vertex of the graph of \(f(x)=|2x-8|+3\)?

Answer and explanation

Correct answer: \((4,3)\)

The vertex of an absolute-value function occurs where the expression inside the modulus becomes zero. Thus, \(2x-8=0\) gives \(x=4\). Then \(f(4)=|0|+3=3\), so the vertex is \((4,3)\). Option C results from incorrectly taking \(x=8\), while the outside \(+3\) shifts the graph 3 units upward. Exam tip: Rewrite the function in the form \(a|x-h|+k\); its vertex is \((h,k)\).

Related tags

Standard-FunctionsAbsolute-Value-GraphVertexModulus-FunctionCoordinate-GeometryGraphs Of Standard FunctionsRelations And FunctionsMathematics

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