Question

What are the coordinates of the vertex?

Answer 1

Parabolas always have a lowest point (or a highest point, if the parabola is upside-down) This point where the parabola changes direction, is called the vertex. If the quadratic is written in the form y=a(x-h)2+k then the vertex is the point (h,k)

Answer 2

a vertex is where curves or lines meet. in this picture the vertex is x-1 y -4