Write an equation to express the value of h+k

When written in "vertex form":

• (h, k) is the vertex of the parabola, and x = h is the axis of symmetry.

• the h represents a horizontal shift (how far left, or right, the graph has shifted from x = 0).

• the k represents a vertical shift (how far up, or down, the graph has shifted from y = 0).

• notice that the h value is subtracted in this form, and that the k value is added.

If the equation is y = 2 (x - 1) 2 + 5, the value of h is 1, and k is 5.

If the equation is y = 3 (x + 4) 2 - 6, the value of h is - 4, and k is - 6.