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Home Q & A Board Science-Related Homework Help Mathematics
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Meme12 Meme12
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11 years ago
My vertex is (0,4.2) and the other point is (-3,2) and I totally blanked on how to do this
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#1
11 years ago
y-k = a(x-h)^2  where (h,k) is the vertex.

y-4.2 = a(x-0)^2.

Substitute (-3,2) to solve for a:  2-4.2 = a(-3)^2,  a = -2.2/9.

The equation is y - 4.2 = -2.2/9 x^2
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illestbillestb
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11 years ago
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