Solving Quadratics In-Class Review Day Somidvar

What Key Feature are you looking for if the question is: This can be modeled with the function h(t) = -16t² + 96t. What is the initial height of the rocket?

• x-intercept

• y -intercept

• vertex

• axis of symmetry

About how high is the rocket after 1 second?

After 2 seconds, about how high is the rocket?

How many solutions does this graph have?

• one

• two

• no solutions

• cannot be determined

A ball is thrown into the air from the edge of a 48-foot-high cliff so that it eventually lands on the ground. The graph below shows the height, y, of the ball from the ground after x seconds.

For which interval is the ball's height always decreasing?

Tags

CCSS.HSF.IF.B.4

How long did it take the rocket to reach its maximum height?

• -2, 4
• -8
• ±8
• No real solution

Tags

CCSS.HSA-REI.B.4B

Find the zeros of this quadratic.

• b=4/5, b=3

• b=4, b=-3

• b=1/5, b=3

• b=4/5, b=-3

Tags

CCSS.HSA-REI.B.4B

How many zeros does this parabola have? 

• 3

• 2

• 0

• 1

Tags

CCSS.HSF-IF.C.7A

Solve
a² + 2a - 24 = 0

• a = -6, 4

• a = 6, -4

• a = 12, -2

• a = 8, -3

Tags

CCSS.HSA-REI.B.4B