Quadratic functions

What is the Domain and Range?

• Domain: All real numbers

• Range: $x\ge3$

• Range: $y\ge-4$

• Domain: $x\ge3$

• Domain: $y\ge-4$

The graph of a quadratic function k is shown on the graph to the right. Which statements are best supported by the graph?

• The x-intercepts are located at (-3, 0) and (3, 0).

• The y-intercept is (0, 9).

• The axis of symmetry x=0

• This quadratic graph has a minimum

What are the roots of the graph shown?

• (1, 0)

• (3, -4)

• (0, 5)

• (5, 0)

Does the graph have a minimum or maximum value?

• minimum

• maximum

Find the root(s) of this parabola?

• y = 0

• x = 1, x = 7

• x = 4

• x = 4, y = −9

What is the vertex (turning point) of this parabola?

• (−1, 3)

• (3, −1)

• (5, 0)

• (0, 5)

What is the zero, or solution of this graph?

• (0, 2500)

• y = 2500

• (2.5, 2531.25)

• x = 25

What is the range of this function?

• All real numbers.
• All real numbers greater than or equal to 0.
• All real numbers greater than or equal to -2.
• All real numbers greater than or equal to 2.

If the blue graph is
f(x) = x² 
the red must be...

• g(x) = (x + 3)²
• g(x) = (x - 3)²
• g(x) = x² + 3
• g(x) = x² - 2

Find the root(s) of this parabola?

• x = −6, x = 0

• x = −6

• x = −3

• x = −3, y = −9