Question

Determine the vertex of y=4(x-25)2+ 91

Answer 1

(25, 91)

Explanation:

y = a(x - h)² + k ← vertex form of the equation of the parabola with vertex (h, k)

So y = 4(x - 25)² + 91 means:

a = 4

x - 25 = x - h ⇒ - 25 = - h ⇒ h = 25

+ 91 = + k ⇒ k = 91

Therefore vertex is:

(25, 91)