1: Key features of quadratic functions

What is the vertex?

• (-3, 0)

• (3, 0)

• (0, 18)

• (18, 0)

What is the equation of the axis of symmetry?

• y = 0

• x = 0

• x = 3

• x = -3

What is the significance of the ordered pair (0, -2) to the graph?

• It is the vertex

• It is an x-intercept

• It is the y-intercept

• It is the axis of symmetry

Determine the domain and range of the function

• Domain: All real numbers, Range: All real numbers

• Domain: x ≥ -4, Range: All real numbers

• Domain: All real numbers, Range: y ≥ -4

• Domain: -1 ≤ x ≤ 5, Range: y ≥ -4

Determine the key features of the given function. Pick all that apply.

 $f\left(x\right)=\ x^2+10x\ +16$  

• y-intercept is located at (0, 16)

• y-intercept is located at (0, 10)

• It is a positive function with a minimum

• It is a negative function with a maximum

• Reflects over the x-axis

Is the vertex point a max or min?

• max

• min

What are the green dots called?

• axis of symmetry
• vertex
• parabola
• roots or x-intercepts

What is the green dashed line called?

• roots or x-intercepts
• parabola
• axis of symmetry
• line of dashes

Identify the y-intercept

• (0, -3)

• (0, 1)

• (0, 3)

• (2, 1)

What is the vertex?
f(x)=x²-8x+3

• (-8, 3)
• (4, -13)
• (4, 0)
• (-4, 51)