If you have the equation of a parabola in vertex form y = a(x - h)2 + k, then the vertex is at (h, k) and the focus is (h, k + 1/(4a)). Notice that here we are working with a parabola with a vertical axis of symmetry, so the x-coordinate of the focus is the same as the x-coordinate of the vertex
If the equation is in the form: y = a(x - h)² + k
then the vertex is the point (h, k) and the focal point is the point (h, k + 1/(4a)).
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If you have the equation of a parabola in vertex form y = a(x - h)2 + k, then the vertex is at (h, k) and the focus is (h, k + 1/(4a)). Notice that here we are working with a parabola with a vertical axis of symmetry, so the x-coordinate of the focus is the same as the x-coordinate of the vertex