Quadratic Key Functions

Which point is the vertex?

• (-8, 0)

• (-5, -9)

• (-2, 0)

• (-9, -5)

State the domain and range.

• Domain: All real numbers, Range: y ≥ -9

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

• Domain: x ≥ -8, Range: y ≥ -9

• Domain: x ≥ -8, Range: All real numbers

Which function has an axis of symmetry of x = 0?

• 
• 
• 
• None of the above

What is the range of the function?

What is the domain of the function?

What is the increasing interval of the function?

What is the decreasing interval of the function?

Find the increasing interval

Find the axis of symmetry

• x = 2

• x = -2

• x = 0

• x = 4

Which function has a vertex that is a minimum?

• 
• 
• 
• All of the above