Functions Review

The graph corresponds to which equation?

• y = (x + 1)(x - 4)

• y = (x - 1)(x + 4)

• y = (x + 1)(x + 4)

• y = (x - 1)(x - 4)

What are the x-intercepts of the function?

y=(x-4)(x-2)

• x=4 and x=2

• x=-4 and x = -2

• x = 4 and x= -2

• x = -4 and x = 2

Where is the axis of symmetry for this parabola?

• x = −1
• x = 0
• y = 3
• x = −3

A parabola has a vertex at (-3,2).
Where is the axis of symmetry?

• y = -2
• x = 3
• x = -3
• y = 2

What is the range of the function?
*Hint: Range is all of the y-values included in the function. 

• -6≤y≤3
• y≥3
• All real numbers
• y≤3

What is the domain and the range for the graph?

• Domain : -2 ≤ x ≤ 2
  Range : 0 ≤ y ≤ 4
• Domain : 0 ≤ x ≤ 4
  Range : -2 ≤ y ≤ 2
• Domain : All real #s
  Range : y ≤ 4
• Domain : -2 ≤ x ≤ 2
  Range : y ≤ 4

What is the location of the vertex?
4x² - 24x + 20

• (4 , 20)

• (3, -16)

• (-2 , 16)

• (-5, 12)

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

• 2
• -2
• 1
• -1

What is the axis of symmetry?
y = 3x² - 6x + 4

• x=1
• x=-6
• x=2
• x=-1

Is this a function?

• Yes

• No