Question

Find the equation of the axis of symmetry of the following parabola algebraically,
y = 3x^2+18

Answer 1

Explanation:

Vertex-form equation for vertical parabola:

 y = a(x-h)² + k

with

 vertex (h,k)

 axis of symmetry: x = h

Apply your equation

y = 3x² + 18

vertex (0,18)

axis of symmetry: x = 0