SOLUTION: What is the directrix of the parabola with equation 36x = 9y2? show work please

Question 475247: What is the directrix of the parabola with equation 36x = 9y2? show work please
Answer by robertb(5830) (Show Source): You can put this solution on YOUR website!
The standard form of the parabola is , where (h,k) is the vertex, and c is the directed distance between the focus and the vertex.
==> the vertex is (0,0), the equation is equivalent to , and 4c = 4.
==> c = 1.
Since the directrix has the same (absolute) distance as the focus from the vertex, but located on the opposite side of the vertex, the directrix is the (vertical) line x = -1.
RELATED QUESTIONS
What is the directrix of the parabola with equation -28y = x2? show work... (answered by robertb)

Please show work and thanks in advance. Find the equation of the parabola with the given (answered by lwsshak3)

What is the focus of the parabola with equation 16y = x^2? show work please... (answered by robertb)

What is the equation of a parabola with a focus (10,6) and directrix y=4? Please show me... (answered by galactus)

use the information provided to write the equation of each parabola focus(-12,0)... (answered by josgarithmetic)

use the information provided to write the equation of each parabola vertex(0,0)... (answered by josgarithmetic)

Write the equation of a parabola with focus (-2,4) and directrix y=2 . Show your work,... (answered by josgarithmetic)

what is the directrix of the parabola with the equation... (answered by josgarithmetic)

With vertex (2, -3) and directrix y=-7... What is the equation of the... (answered by lwsshak3)