Graph the quadratic function. Determine the vertex and axis of symmetry.f(x) = x2 + 2x - 3
A. vertex: (1, - 4)
axis of symmetry: x = 1
B. vertex: (- 1, - 4)
axis of symmetry: x = - 1
C. vertex: (1, - 4)
axis of symmetry: x = 1
D. vertex: (- 1, - 4)
axis of symmetry: x = - 1
Answer: D
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