Question

A parabola with vertex (h, k) and a vertical axis of symmetry is modeled by the equation y - k = a(x - h)2. Determine the vertex for a parabola modeled by y - 4 =
1
2
(x + 1)2.

Answer 1

hello :
y - 4 = (x+1)²
h = -1    and  k=4
the vertex is : A(-1 ; 4)