Answer:
B
Step-by-step explanation:
The axis of symmetry is a vertical line passing through the vertex of the quadratic function, with equation
x = c ( c is the x- coordinate of the vertex )
The equation of a quadratic function in vertex form is
• y = a(x - h)² + k
(h, k ) are the coordinates of the vertex and a is a multiplier
given
y = 2(x + 3)² + 5 , that is
y = 2(x - (- 3) )² + 5 ← in vertex form
with h = - 3 , k = 5 and a = 2
Then coordinates of the vertex = (- 3, 5 )
Thus equation of axis of symmetry is
x = - 3