www.varsitytutors.com/hotmath/hotmath_help/topics/vertex-of-a-parabola

y=ax2+bx+c . But the equation for a parabola can also be written in "vertex form": y=a(x−h)2+k. In this equation, the vertex of the parabola is the point (h,k) .

www.purplemath.com/modules/grphquad2.htm

... in the examples). Also, if a is negative, then the parabola is upside-down. ... Find the vertex of y = 3x2 + x – 2 and graph the parabola. To find the vertex, I look ...

www.mathwarehouse.com/geometry/parabola/vertex-of-a-parabola.php

Vertex of a parabola, explained with pictures and examples and formulas. ... The vertex of a parabola is the highest or lowest point, also known as the maximum ...

www.khanacademy.org/math/algebra/quadratics/quad-standard-form-alg1/v/ex3-completing-the-square

Sal rewrites the equation y=-5x^2-20x+15 in vertex form (by completing the square) in order to identify the vertex of the corresponding parabola.

virtualnerd.com/algebra-1/quadratic-equations-functions/graphing/graph-basics/vertex-example

The vertex of a quadratic equation is the minimum or maximum point of the ... problem; skill; vertex; parabola; quadratic function; maximum; minimum; max; min ...

www.algebralab.org/lessons/lesson.aspx?file=algebra_quad_vertex.xml

The vertex of a parabola is the high point or low point of the graph. The method you use to find the vertex will depend on the form in which the function is given.