Finding Key Features of Quadratic Functions

•   a = 1

  b = 4

  c = 3

•   a = x²

  b = 4x

  c = 3

•  a = -1

  b = 4

  c = -3

•   a = -x²

  b = 4x

  c = -3

Label the correct key features of the graph.

a

b

c

Vertex

x-intercept

Axis of Symmetry

The graph of any quadratic function is called a...

• axis of symmetry

• vertex

• parabola

• y-intercept

• None of these

The line that divides a parabola in half is called the...

• axis of symmetry

• vertex

• y-intercept

• x-intercepts

• None of these

The turning point of a parabola is called the...

• axis of symmetry

• vertex

• y-intercept

• x-intercepts

• direction of opening

What is the vertex?