Which equation is equivalent to the formula below?

The answer is C

Explanation:

y = a(x-h)²+k

Make each variable as a subject :

k) k = y-a(x-h)²

x) a(x-h)² = y-k

(x-h)² = (y-k)/a

x-h = +-√(y-k)/a

x = +-√(y-k)/a + h

a) a(x-h)² = y-k

a = y-k/(x-h)²

h) a(x-h)² = y-k

(x-h)² = (y-k)/a

x-h = +-√(y-k)/a

h = x-√(y-k)/a