Applying and analysing quadratic functions

The zeros of

y = -2x² - 4x + 16 are...

• -4 and 2

• 4 and -2

• 8 and -2

• -4 and 16

• x = 2, x = -6

• x = -2, x = -6

• x = 4, x = -4

• x =0, x = -8

• 0

• 3

(9, 20), (8, 18), (10, 23) Would these points make a straight line?

• No

• Yes

The height (h) of a plant varies directly as the square of the amount of sunlight (s).

Which statement is correct?

What are the zeros of the quadratic equation  $y=x^2-5x-6$  ?

• 2 and -3

• -2 and 3

• 6 and -1

• -6 and 1

For the function shown in the graph, is the discriminant positive, negative, or zero?

• Positive

• Negative

• Zero

• Unable to tell from the graph

Which equation in Standard Form below has solutions x = 7 and x = 3 ? 

Which of the following quadratics have the x-intercept:
(2 , 0) & (-4 , 0)

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

What are the zeros (x-intercepts)?

• x = 4, 7
• x = -1, 4/7
• x = -4/7, 1
• x = 7, -4