Answer :

apologiabiology
vertex is (h,k)
se see vertex is (1,-4)
y=a(x-1)^2-4
find a
another point is (4,-2)

-2=a(4-1)^2-4
-2=a(3)^2-4
-2=9a-4
add 4
2=9a
divide b 9
2/9=a


[tex]f(x)= \frac{2}{9}(x-1)^2-4 [/tex]

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