Solution: The vertex form of a parabola is $ y = -a(x - h)^2 + k $, where $ (h, k) $ is the vertex. Given the vertex $ (3, 10) $, the equation becomes $ y = -a(x - 3)^2 + 10 $. Substituting the point $ (0, 4) $:

Sun, 10 May 2026 04:01:04 +0000

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