Graphing
Calculator
Math
Worksheets
Scientific
Calculator
Chart
Maker


A+    A−    B  
Home
Graphing Calc
Algebra
Fun Games
Geometry
Interactive
Trigonometry
Scientific Calc
Home
Graphing Calc
Algebra
Fun Games
Geometry
Interactive
Trigonometry
Scientific Calc
The vertex of a parabola is the highest or lowest point, also known as the maximum or minimum of a parabola.
Picture of Vertex of A Parabola
Properties of the Vertex of a Parabola
  • is the maximum or minimum value of the parabola (see picture below)
  • is the turning point of the parabola
  • the axis of symmetry intersects the vertex (see picture below)
    Picture of vertex and axis
How to find the vertex
Depends on whether the equation is in vertex or standard form
Finding Vertex from Standard Form
The x-coordinate of the vertex can be found by the formula -b/2a, and to get the y value of the vertex, just substitute -b/2a, into the equation.
Finding Vertex from Vertex Form
It's called 'vertex form' for a reason! The vertex is just (h,k) from the equation.