Chapter 9 Review

What is the vertex of y= x² - 8x + 14 ?

• (2, 4)
• (-4, -2)
• (4, -2)
• (-2, 4)

Find the vertex of the quadratic:
y = -2x² + 4x + 3

• (0, 3)
• (-1, 5)
• (1, 5)
• (1, -5)

• A
• B
• C
• D

Find the axis of symmetry for

f(x) = x² − 8x + 15.

• x = −4

• x = 4

• y = 4

• y = −4

Find the vertex

y = x² + 16x + 71

• (−8, 7)

• (−8, 3)

• (8, 10)

• (16, −2)

What is the y-intercept of the function?

y = 2x² + 3x + 5

• 2

• 3

• 5

• Cannot be determined

If the   $a$  value in a quadratic function is positive, in which direction does the graph of the function open?

• up

• down

• left

• right

If the  $a$  value in a quadratic function is negative, in which direction does the graph of the function open?

• up

• down

• left

• right

What's the axis of symmetry of  $y=3x^2-6x+4$   ?

•  $x=1$  

•  $x=-6$  

•  $x=2$  

•  $x=-1$  

Which parent function matches the graph?

• y = |x|
• y = ∛(x)
• y = x²
• y = a⋅b^x