Quadratic Review

If the a value is positive, which direction does the graph open?

• up

• down

• left

• right

What is the axis of symmetry?

• the slope of the graph

• the dividing line for a parabola

• a way to spin my pencil

• the x-axis

What are the zeros of the quadratic function?
y = x² - 2x - 15

• x = -2
  x = -15

• x = -3
  x = 5

• x = 3
  x = -5

• x = 1
  x = -16

What are the x-interepts for the graph of the function:  y = x² - 3x - 10 

• -5, 2

• -5, -2

• 5, -2

• 5, 2

What is the vertex of the parabola:
y = -12x + 22 + 2x²

• (3,4)

• (-3,4)

• (3, -4)

• (-3,-4)

Find the zero(s) of the function: y = x² + 4.75x + 4.375

• 3.5 and 1.25

• 3 and 1.33

• -3 and 1.33

• -3.5 and -1.25

The discriminant is

• aX²  + bX  +  c

• b - 4ac

• b² - 4ac

• b² + 4ac

For the function above, is the discriminant positive, negative, or zero?

• Positive

• Negative

• Zero

• Not Sure

Determine the value of the discriminant and describe the number and type roots for the following:

x² + 7x + 13

• 101, 2 real roots

• 3, 2 real roots

• -101, 2 imaginary roots

• -3, 2 imaginary roots

If the discriminant is negative, then the quadratic has:

• 1 Real Solution

• 2 Real Solutions

• Half a Solution

• 2 Complex (imaginary) Solutions