Quadratic Functions

What are the coordinates of the y-intercept of

 $y=2x^{2\ }-8x+3$  

• (0,3)

• (3,0)

• (0,2)

• (0,-8)

What are the coordinates of the vertex of

 $y=-2\left(x+1\right)^2-5$  

• (-2,-5)

• (1,-5)

• (-1,-5)

• (0,-5)

What are the x-intercepts of

 $y=-\left(x+4\right)\left(x-3\right)$  

• -4 and 3

• 4 and -3

• -1 only

• x + 4

What is the axis of symmetry for the following equation?
y=4x²-8x+9

• x=-8
• x=1
• x=-1
• x=2

Tags

CCSS.HSA.REI.B.4

Which equation best represents the graph?

• y = 2(x - 4)² + 5
• y = 2(x + 4)² + 5
• y = -2(x - 4)² + 5
• y = -2(x + 4)² + 5

Tags

CCSS.HSF-IF.C.7A

Convert to vertex form:
f(x) = x² + 10x + 24

• f(x) = ( x - 5 )² + 1
• f(x) = ( x + 5 )² - 1
• f(x) = ( x - 5 )² - 1
• f(x) = ( x + 5 )² + 1

Tags

CCSS.HSA.SSE.A.2

CCSS.HSA.SSE.B.3

CCSS.HSF.IF.C.8

Does the following function have a maximum or a minimum:

 $y=250-3x-x^2$  

• Maximum

• Minimum

• Cannot be determined

• Both 

(Part 1 of 3)

A ball is launched into the air. Its height in meters, t seconds after launching is given by

 $h\left(t\right)=16t-t^2$  
At what time does the ball reach its maximum height?

• t = 0

• t = 4

• t = 8

• t = 16

(Part 2 of 3)

A ball is launched into the air. Given that the ball reaches its maximum height (in meters) at t = 8 seconds, find the maximum height

 $h\left(t\right)=16t-t^2$  

• 1 m

• 8 m

• 16 m

• 64 m

(Part 3 of 3)

At what time does the ball hit the ground again?

 $h\left(t\right)=16t-t^2$  

• t = 2

• t = 8

• t = 16

• t = 50