Review over 9.1-9.3

The graph of a quadratic function is called a ____________.

• Parabola

• Curve

• Circle

• Line

The lowest or highest point on a parabola is called the ________________.

• vertex

• axis of symmetry

• center

• quadratic point

The line that passes through the vertex and divides the parabola into two symmetric parts is called the ____________.

• Vertex

• Axis of Symmetry

• Line of reflection

• Parent function

Choose the correct "parent" equation for a quadratic function.

• $y=mx\ +\ b$

• $y\ =x^2$

• $y=3^x$

• $y=x^2+3x-5$

Check all quadratic functions that open down.

• $y=-x^2-1$

• $y=x^2-6x-3$

• $y=-\frac{1}{2}x^2+5$

• $y=3x^2+6x\ +\ 10$

Is the graph of  $y=\frac{1}{2}x^2+5$  narrower or wider when compared to the graph of  $y=x^2$  ?

• narrower (vertical stretch)

• wider (vertical shrink)

Is the graph of  $y=x^2+5$  shifted up or down when compared to  $y=x^2$  ?

• shifted up 5 units

• shifted down 5 units.

 Match the quadratic graph with the function

 $y=-\frac{1}{2}x^{2\ }+\ 2$ 

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• 
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 $y=ax^2+bx\ +c$  What is the correct formula for finding the axis of symmetry for a quadratic function

•  $-\frac{b}{2a}$  

•  $b^2-4ac$  

•  $\frac{ac}{2}$  

•  $\frac{b}{2}$  

Find the equation for the axis of symmetry for the given quadratic function $y=x^2+8x-9$  

• x = 8

• x = -4

• x = 4 
  

• x = -8