Find the vertex, focus, and directrix of the parabola. Graph the parabola.x2 - 8x + 4y + 28 = 0

A. vertex: (4, -3)
focus: (5, -3)
directrix: x = 3

B. vertex: (4, -3)
focus: (3, -3)
directrix: x = 5

C. vertex: (4, 3)
focus: (4, 2)
directrix: y = 4

D. vertex: (4, -3)
focus: (4, -4)
directrix: y = -2


Answer: D

Mathematics

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