3.1 Graphing Quadratic Functions

What is the formula above primarily used for?

• Finding the axis of symmetry from standard form
• Finding the vertex from standard form
• Finding the vertex from vertex form
• Finding the vertex from standard form

What do we call the graph of a quadratic function?

• parabola
• linear
• cubic
• sinusoidal

 $f\left(x\right)=ax^2+bx+c$  Which letter of the standard form of a quadratic represents the y-intercept?

•  $a$  

•  $b$  

•  $c$  

•  $f\left(x\right)$  

Answer explanation

Just like slope-intercept form ( $y=mx+b$  ) the number without the variable is the y-intercept.

The axis of symmetry is also known as the:

• minimum

• maximum

• y-intercept

• x coordinate of the vertex

What is the equation for axis of symmetry?

• y=3
• x=3
• x=5
• x=1

What is the green dot on the parabola called?

• maximum
• minumum
• roots
• zeros

Does this parabola have a maximum or minimum?

• Maximum
• Minimum

Find the y-intercept of f(x) = 2x² - 2x + 1

• 2
• -2
• 1
• -1

What is the vertex of the quadratic function:
y = x² - 6x + 11?

• (3,2)
• (-3,-2)
• (-3,2)
• (3,-2)

Determine the vertex of the parabola:
y = 5x² - 20x + 13

• (5, -7)
• (-2, -7)
• (2, -7)
• (-7, -2)