A parabola is represented by the equation y2 = 5x. Which equation represents the directrix?

y = - 20 x = - 20 y = - 5/4 x = - 5/4

Question

Mathematics

Amy Sosa

2 October, 12:41

A parabola is represented by the equation y2 = 5x. Which equation represents the directrix?

y = - 20 x = - 20 y = - 5/4 x = - 5/4

+2

Answers (1)

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Bootsie · Answer 1

The equation for the directrix of a parabola is represented by y = k - p where k is the y value of the vertex of the parabola and p is from the equation of the parabola y^2 = 4px

k = 0

4p = 5

p = 5/4

y = - 5/4

A parabola is represented by the equation y2 = 5x. Which equation represents the directrix?y = - 20 x = - 20 y = - 5/4 x = - 5/4

A parabola is represented by the equation y2 = 5x. Which equation represents the directrix?

y = - 20 x = - 20 y = - 5/4 x = - 5/4