Parabolas

Question 1

Which statements are true for the equation x2 = −4y? Check all that apply.The axis of symmetry is x = 0.The focus is at (0, –1).The parabola opens up.The parabola opens right.The value of p = −1.The equation for the directrix is y = 0.

Revolt · Accepted Answer

The axis of symmetry is x = 0.; The focus is at (0, –1).; The value of p = −1.

Question 2

directix✔ focusoriginx-axis

Revolt · Accepted Answer

focus

Question 3

When the focus and directrix are used to derive the equation of a parabola, two distances were set equal to each other.

Revolt · Accepted Answer

✔ a point on the parabola; The distance between the directrix and is set equal to the distance between the and the same point on the parabola.: a point on the parabola; The distance between the directrix and is set equal to the distance between the and the same point on the parabola.: focus

Question 4

directix✔ focusoriginx-axis

Revolt · Accepted Answer

✔ focus

Parabolas Answers

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