What is the vertex and the equation of the axis of symmetry of the graph of y is equal to x squared minus 6 x minus 7 ?

For y = x² − 6x − 7, the vertex’s x-coordinate is −b/(2a) = −(−6)/(2·1) = 3, so the axis of symmetry is x = 3. Substitute x = 3 into the equation: y = 3² − 6(3) − 7 = −16. The vertex is (3, −16), matching choice B.

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