Finding the vertex of the quadratic by using the equation x-b2a and then substituting that answer for y in the orginal equation. The h represents the horizontal shift and k represents the vertical shift. The inflection point where the graph changes direction is called the vertex of the parabola.
While the standard quadratic form is a x 2 b x c y the vertex form of a quadratic equation is y a x h 2 k.
The y intercept is still found by replacing x with zero and simplifying. The inflection point where the graph changes direction is called the vertex of the parabola. This introduction to zeros as solutions to quadratic functions will lead to solving using factoring and graphing. We take half of b square it and then add it and subtract it from the same side of the equation.