Find the focus and directrix of the parabola.y2 = -4x
A. (1, 0); x = -1
B. (-1, 0); x = 1
C. (0, -1); y = 1
D. (-1, 0); y = 1
Answer: B
Mathematics
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A. x = -1 B. x = 1 C. x = ±1 D. None
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A. ?? B. ?? C. ?? D. ??
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II. 
A. I is a proportion, II is not a proportion. B. I is not a proportion, II is a proportion. C. I and II are both proportions. D. Neither I nor II are proportions.
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Fill in the blank(s) with the appropriate word(s).
Mathematics