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Mathematics 21 Online
OpenStudy (anonymous):

the equation for the directrix of this parabola is x=-1 x=1/4y^2

OpenStudy (anonymous):

jimthompson5910 (jim_thompson5910):

x = (1/4)*y^2 4x = y^2 4*1*(x-0) = (y-0)^2 it's in the form 4p(x-h) = (y-k)^2 where (h,k) = (0,0) and p = 1

jimthompson5910 (jim_thompson5910):

Use this to find the focus and directrix

jimthompson5910 (jim_thompson5910):

idk yet, tell me what the focus is

jimthompson5910 (jim_thompson5910):

keep in mind that this parabola opens to the right side

OpenStudy (anonymous):

@triciaal

jimthompson5910 (jim_thompson5910):

|dw:1418708087507:dw|

jimthompson5910 (jim_thompson5910):

what is the vertex?

OpenStudy (anonymous):

0,0

jimthompson5910 (jim_thompson5910):

|dw:1418708272721:dw|

jimthompson5910 (jim_thompson5910):

The focus will be to the right of the vertex 1 unit away |dw:1418708294582:dw|

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