Introduction to Quadratic Functions Vocab

How we feeling?

• Neat

• Relaxed

• I don't know man, but hey, we here

• Awesome

Quadratics are polynomials with x2 as the highest power.

• yes

• nope

Concavity

If the parabola opens upward,

• it is concave up.

• concave down.

Concavity

If the parabola opens upward, it is concave up.

If the parabola opens downward, 

           It is

• concave down

• concave up

Vertex

• The lowest point (if concave up)

  or highest point (if concave down)

  Written as a point ( , )

• A vertical line through the

  vertex that slices the parabola into two pieces

  that are mirror images.

Axis of Symmetry

• A vertical line through the

  vertex that slices the parabola into two pieces

  that are mirror images.

  It’s written as 

  x = the number the vertical line crosses

• The points where the graph crosses the x-axis

Will there always be 2 x-intercepts for quadratics/parabolas?

• no

• yes

y-intercept

• The point where the graph crosses the y-axis 

• The point where the graph crosses the x-axis 

x-values you can plug into the equation and show up as points on the graph

• Domain

• Range

y-values of points that show up on the graph for any x-values that are plugged in

• Range

• Domain