If the directrix of a parabola is the horizontal line y = 3, what is true of the parabola? answer is b

If the directrix of a parabola is the horizontal line y = 3, what is true of the parabola?

A)The focus is at (0, 3), and the equation for the parabola is y2 = 12x.

B)The focus is at (0, –3), and the equation for the parabola is x2 = –12y.

C)The focus is at (3, 0), and the equation for the parabola is x2 = 12y.

D)The focus is at (–3, 0), and the equation for the parabola is y2 = –12x.

B) Is the answer.

this excerpt is taken from the book “we shall not be moved : the women’s factory strike of 1909 “ and is written by joan dash. it is the story of the great strike when almost 30thousand women working in factories in america formed a union to fight unsafe working conditions, long working hours and miserable wages.

question: which best states the author’s purpose for including this information in the text?

answer: to challenge the reader’s ideas about a historical event

b is the correct answer