Marc D. answered • 12/01/20
Tutor
New to Wyzant
Just plug into the formula for focus:
The parabola: y = a(x-h)2 + k has a focus at (h,k + 1/4a)
h = 2, a = 1/16 and k = -1.
4a is 4*1/16 = 4/16 = 1/4. so 1/4a = 4
This gives the focus at (2, -1 + 4) = (2,3)
Paul S.
The answer was actually correct
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12/02/20
Marc D.
Kahn academy has a good tutorial on this although it uses different symbols. It's worth looking at. The idea is you can use the eulerian distance formula from Pythagoras to find an equation in y. Then you just have to plug and play :) ----- Distance between 2 points is sqrt((a-x)^2 + (b-y)^2) where the points are (a,b) and (x,y)
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12/02/20
Mark M.
No, the focus is at (h, k)!12/02/20