Question

Find the equation of the axis of symmetry of the graph of y = (x + 3)^2 - 5.

Answer 1

equation of the axis of symmetry is x = - 3

Explanation:

Recall that the axis of symmetry of a quadratic is the vertical line of the form

x = x vertex

and in our case the x position of the vertex is x = -3 because the expression for the quadratic is given in VERTEX form, and the x of the vertex is evident from the number that is added to x inside the parenthesis,

then, the equation of the axis of symmetry is:

x = - 3