Asked by Rob
hi i was wondering how would you find the equation of a parabola with it's vertex at -2,0, and with no directrix or focus given. the parobala opens toward the left. the two choices in my multiple choice answer sheet that sound the most logical would be x+2=-1/8y^2 and x-2=1/8y^2.
Answers
Answered by
drwls
x + 2 = -1/8y^2 would be the choice, because its highest x value is -2, at y=0.
The coeffient in from of the y^2 could be any positive number - it deterrmines where the focus and directrix are.
The coeffient in from of the y^2 could be any positive number - it deterrmines where the focus and directrix are.
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