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ntips.//www.webassign.net/web/Student/Assignment-Responses/submit?dej ? r secure I 5. evious Answers SPreCalcl 11 1.038 M Find an equation for the parabola that has its vertex at the origin and satisfies the given conditio Directrix y- Need Help?dMaster Submit Answer Save Progress Practice Another Version 6. -1 points SPreCalc7 11.1.044 Find an equation for the parabola that has its vertex at the origin and satisfies the given conditions Focus on the negative y-axis, 4 units away from the directrix. Need Help? EReadIn 7. -4 points SPreCalc7 11.1.050 MI Find an equation of the parabola whose graph is shown. O Type here to search

Explanation / Answer

1) directrix

y = 1/2

directrix lies always outside the parabola

so, parabola opens downwards

vertex = (0,0)

focus = ( 0,-1/2 )

hence, equation is

-x^2 = 2y

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